{"product_id":"1970-1972-chevy-v8-hei-engine-wiring-harness-31520h","title":"American Autowire - 1970-1972 Engine Wire Harness-GM Truck - 31520H","description":"\u003ch2 style=\"text-align: center;\"\u003eAmerican Autowire - 1970-1972 Engine Wire Harness-GM Truck - 31520H\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eReplace aging engine wiring and accommodate an HEI ignition conversion with this \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1970–1972 Chevrolet V8 Engine Wiring Harness\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e from American Autowire.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1970–1972 Chevrolet trucks equipped with a V8 engine and automatic transmission\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this Factory Fit replacement harness features wiring modified for a GM large-cap HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike an original points-ignition harness, this HEI version replaces the factory ignition resistance wire with a standard 12-volt feed. It also includes a connector for a GM large-cap HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire manufactures its Factory Fit engine harnesses according to original General Motors specifications. Each harness arrives fully assembled and taped, connects at the factory firewall location, and follows original-style routing through the engine compartment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhether you're restoring a classic Chevy C10, replacing deteriorated wiring, or upgrading your V8-powered truck to electronic ignition, this harness provides an application-specific replacement for your truck's electrical configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eManufacturer:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e American Autowire\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eManufacturer Part Number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 31520H\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProduct Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Engine Wiring Harness\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProduct Line:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Factory Fit\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eVehicle Years:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1970–1972\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eVehicle Application:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Chevrolet Trucks\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eEngine Application:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e V8\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eTransmission:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eIgnition Configuration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e HEI Electronic Ignition\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eIgnition Feed:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Standard 12-Volt Feed\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDistributor Connector:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e GM Large-Cap HEI\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eQuantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Sold Individually\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for 1970–1972 Chevrolet truck applications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntended for V8 engines with automatic transmissions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eModified for HEI electronic ignition\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplaces the original ignition resistance wire with a standard 12-volt feed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncludes a connector for a GM large-cap HEI distributor\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufactured by American Autowire\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePart of the Factory Fit replacement wiring line\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufactured according to original GM specifications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully assembled and taped\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConnects at the original firewall location\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFollows factory-style engine compartment routing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHelps replace damaged, deteriorated, or previously modified engine wiring\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003e1970–1972 Chevrolet C-Series – 2WD Trucks\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePotential applications include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1970–1972 Chevrolet C10\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1970–1972 Chevrolet C20\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1970–1972 Chevrolet C30\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e1970–1972 Chevrolet K-Series – 4WD Trucks\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePotential applications include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1970–1972 Chevrolet K10\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1970–1972 Chevrolet K20\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eRequired Vehicle Configuration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis harness is intended for trucks equipped with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e1970–1972 Chevrolet truck electrical configuration\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eV8 engine\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAutomatic transmission\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHEI electronic ignition\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible factory firewall wiring connections\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e American Autowire lists part 31520H for 1970–1972 Chevrolet trucks with V8 engines and automatic transmissions. Verify your specific engine, ignition system, and electrical connections before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eDesigned for HEI Electronic Ignition\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eWhat Is HEI Ignition?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eHEI stands for High Energy Ignition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGM developed HEI electronic ignition as an alternative to traditional breaker-point ignition systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHEI distributors are a popular upgrade for classic Chevrolet V8 engines because they eliminate the periodic adjustment and replacement of conventional ignition points.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eStandard 12-Volt Ignition Feed\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOriginal points-ignition systems commonly use resistance in the ignition feed circuit to reduce current through the ignition coil.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA typical GM HEI distributor requires a suitable 12-volt ignition power supply instead.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire modifies part 31520H by replacing the original resistance wire with a standard 12-volt feed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis modification helps accommodate the electrical requirements of a compatible HEI ignition system.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eGM Large-Cap HEI Connector Included\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePart 31520H includes a connector designed for a GM large-cap HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes it a suitable choice for compatible Chevrolet V8 trucks being converted from conventional points ignition to a GM-style HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat If I Have an Aftermarket Distributor?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNot all aftermarket electronic ignition systems use the same connectors or electrical requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire notes that if you're using a distributor other than a GM large-cap HEI unit, the connector may need to be replaced.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVerify your distributor manufacturer's specifications before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eDesigned for V8 Engines\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eChevrolet V8 Application\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire identifies part 31520H for 1970–1972 Chevrolet trucks equipped with V8 engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEngine wiring requirements can vary depending on the engine configuration and location of electrical components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSelecting the correct engine harness helps maintain compatibility with your truck's electrical system.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat If My Truck Has a 396 V8?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire also offers part \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e23230H\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, specifically listed for 1970–1972 Chevrolet trucks equipped with a 396 V8, automatic transmission, and HEI ignition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf your truck has a 396 V8, verify whether part 23230H is the correct harness before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat If My Truck Has a Six-Cylinder Engine?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePart 31520H is intended for V8 applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSix-cylinder trucks require a harness designed for their engine configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat If My Truck Has an Engine Swap?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIf your truck has undergone an engine swap, verify the installed engine's wiring connections, ignition requirements, and compatibility with the factory firewall connection.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eDesigned for Automatic Transmission Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire specifically lists part 31520H for trucks equipped with automatic transmissions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhy Does Transmission Type Matter?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eEngine wiring harnesses can differ between manual and automatic transmission configurations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDepending on the vehicle, the wiring arrangement and electrical connections may vary.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSelecting the correct harness helps maintain compatibility with the truck's electrical system.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat If My Truck Has a Manual Transmission?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePart 31520H is listed for automatic transmission applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf your truck has a manual transmission, select the appropriate harness for that configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFactory Fit Replacement Wiring\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eManufactured to Original GM Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire manufactures its Factory Fit engine harnesses according to original General Motors specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis helps maintain the original-style electrical layout of your classic Chevrolet truck while accommodating the HEI ignition modification.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFully Assembled and Taped\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eEach harness arrives fully assembled and taped, eliminating the need to construct an engine wiring harness from individual wires and terminals.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eOriginal Firewall Connection\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe harness is designed to connect at the original firewall location.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFactory-Style Engine Compartment Routing\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe harness follows original-style routing through the engine compartment, helping maintain a factory-style appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhat Does an Engine Wiring Harness Connect?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eEngine harness circuits vary depending on the vehicle's model year and equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDepending on the application, an engine harness may contain wiring associated with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIgnition system\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eStarter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHeater blower\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEngine temperature sending unit\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOil pressure sending unit\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Not every circuit is included in every harness. Consult your factory service manual or American Autowire to confirm the exact connections included with part 31520H.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhy Replace Your 1970–1972 Chevy Truck's Engine Wiring Harness?\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eReplace Deteriorated Original Wiring\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eEngine compartment wiring is exposed to heat, vibration, moisture, and contaminants.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOver time, insulation can crack, terminals can corrode, and electrical connections can deteriorate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eReplacing an aging harness provides an alternative to repairing multiple damaged wires individually.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAccommodate an HEI Ignition Conversion\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIf you're converting your Chevrolet V8 from points ignition to HEI, this modified harness provides a standard 12-volt ignition feed and GM large-cap distributor connector.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMaintain Transmission Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePart 31520H is designed for automatic transmission applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMaintain an Original-Style Appearance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire's Factory Fit harnesses are designed for restorations where original-style wiring connections and routing are important.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eImportant Fitment \u0026amp; Installation Information\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1970–1972 Chevrolet truck applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntended for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eV8 engines\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRequires an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eautomatic transmission configuration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eModified for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHEI electronic ignition\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncludes a standard 12-volt ignition feed instead of the original resistance wire.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncludes a connector for a GM large-cap HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOther distributor styles may require connector modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTrucks retaining original points ignition should use the appropriate non-HEI harness.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManual transmission applications require verification of the correct harness.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSix-cylinder applications require a different harness.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe 396 V8 automatic HEI configuration has a separately listed harness, part 23230H.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVerify compatibility if your truck has undergone an engine or transmission swap.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConfirm original firewall connections before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThis is an engine wiring harness, not a complete vehicle wiring kit.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFront lighting, dash, and rear lighting harnesses are separate components.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConsult your factory service manual and distributor manufacturer's installation instructions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eWill this engine wiring harness fit my 1970 Chevy C10?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIt may fit if your 1970 Chevrolet C10 has a compatible V8 engine, automatic transmission, HEI ignition, and the correct factory electrical connections.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this harness fit a 1972 Chevy C10?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire lists part 31520H for 1970–1972 Chevrolet trucks. Verify your truck's engine, transmission, and ignition configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat engine is this harness designed for?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire identifies part 31520H for Chevrolet V8 applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor a 396 V8, verify the separately listed part 23230H.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWill this harness fit a six-cylinder engine?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. Part 31520H is intended for V8 applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this harness work with a manual transmission?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePart 31520H is listed for automatic transmission applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf your truck has a manual transmission, select the appropriate harness for that configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this harness provide a 12-volt ignition feed?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. American Autowire replaces the original ignition resistance wire with a standard 12-volt feed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this harness include an HEI distributor connector?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. It includes a connector for a GM large-cap HEI distributor.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWill this harness work with my original points distributor?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis harness is modified for HEI ignition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor an original points distributor, use the appropriate non-HEI engine wiring harness.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan I use this harness with an aftermarket HEI distributor?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePossibly. Distributors other than GM large-cap HEI units may require connector modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVerify compatibility with your distributor manufacturer before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this harness include an HEI distributor?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. This product is an engine wiring harness. The distributor is sold separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWill this fit a GMC pickup?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAmerican Autowire lists part 31520H for Chevrolet trucks. GMC compatibility has not been confirmed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes this replace the entire truck wiring system?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. This product replaces the engine wiring harness. Other vehicle wiring harnesses are separate components.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eRestore Your Chevy Truck's Engine Wiring\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eWhether you're restoring a classic C10, replacing deteriorated engine wiring, or converting your V8-powered Chevrolet pickup to HEI electronic ignition, the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmerican Autowire 31520H Engine Wiring Harness\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides an original-style replacement designed for your truck's specified engine and transmission configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFind the wiring harnesses, electrical components, and restoration parts you need at \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTuckers Classic Auto Parts\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHelping Keep Classic Trucks on the Road Since 1993.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"American Autowire","offers":[{"title":"Default Title","offer_id":45377745060130,"sku":"6118","price":189.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/5867\/7794\/files\/American_Autowire_-_1970-1972_Engine_Wire_Harness-GM_Truck_-_31520H.png?v=1793217751","url":"https:\/\/tuckersparts.com\/products\/1970-1972-chevy-v8-hei-engine-wiring-harness-31520h","provider":"Tuckers Classic Auto Parts","version":"1.0","type":"link"}