Product Description
Michigan Motorsports 85-86 TPI HEI Large Cap to Small Cap Distributor Adapter Harness Wiring Kit
Converts 1985-1986 GM Large Cap Distributor Wiring to 1987-1992 Small Cap Distributor Applications
Upgrade your GM TPI ignition setup with the Michigan Motorsports 85-86 TPI HEI Large Cap to Small Cap Distributor Adapter Harness Wiring Kit. Designed to convert 1985-1986 large cap distributor wiring to the 1987-1992 small cap distributor style, this plug-and-play conversion kit gives you the key harnesses needed for a clean, reliable distributor swap. Instead of hunting down multiple connectors or building a harness from scratch, this kit provides a complete wiring solution that simplifies the conversion and helps maintain a factory-style installation. It is also equivalent to the discontinued ACCEL 74170 F-body Wiring Conversion Kit, making it a practical replacement option for builders converting early TPI distributor wiring.
Key Features & Benefits
- Large Cap to Small Cap Distributor Conversion: Designed to convert 1985-1986 GM large cap distributor wiring to the later 1987-1992 small cap distributor style. This makes distributor upgrades and ignition conversions cleaner, easier, and more dependable for TPI applications.
- Plug-and-Play Wiring Solution: This kit eliminates the need to source individual connectors or build a custom adapter harness from scratch. The included wiring components help reduce installation time, wiring guesswork, and the risk of poor connections during the conversion.
- Complete Conversion Harness Kit: Includes the adapter harness for the large cap to small cap distributor conversion, distributor-to-coil harness, and coil power/tachometer pigtail. This gives builders the major wiring pieces needed to complete a clean and functional ignition setup.
- Equivalent to Discontinued ACCEL 74170: This Michigan Motorsports harness kit is equivalent to the discontinued ACCEL 74170 F-body Wiring Conversion Kit. It is a valuable solution for customers who need that conversion functionality but can no longer source the original ACCEL kit.
- Ideal for TPI Repairs, Swaps & Upgrades: Perfect for early GM TPI ignition conversions, distributor swaps, restoration work, and engine harness cleanup. This kit helps create a more reliable ignition wiring connection while keeping the installation clean and serviceable.
Notes
- Brand: Michigan Motorsports
- Conversion Type: Converts 1985-1986 GM large cap distributor wiring to 1987-1992 small cap distributor wiring.
- Kit Includes: Adapter harness for large cap to small cap distributor conversion, distributor-to-coil harness, and coil power/tachometer pigtail.
- Reference: Equivalent to the discontinued ACCEL 74170 F-body Wiring Conversion Kit.
- Installation Style: Plug-and-play conversion harness design for compatible applications.
Key Fitments
- 1985-1986 GM large cap distributor wiring applications
- 1987-1992 GM small cap distributor wiring applications
- GM TPI distributor conversion applications
- F-body ignition wiring conversion applications
- Fitment note: Designed to replace large cap distributor wiring on 1985-1986 GM models and adapt to small cap distributor wiring used on 1987-1992 GM models.
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Small cap conversion
Everything was great... used on a 91 vette only issue was the flat 4 pin connector had a "keyway" on 1 terminal what was not in the same location... I trimmed it and plugged it in in the correct orientation and worked just fine...
