As mentioned, the GMPP harness will have a lot of extra length. We spend 4-5 days cutting the GMPP harness down to make it look really nice for my '69 Camaro coupe. All of my other cars use a Speartech custom harness. They're worth every penny. They're built for whatever setup you want and can run your auto trans in most cases. No trimming to mess with, and they will also supply the ECM. However, you'll still have to get it tuned. FYI, the GMPP ECM can be programmed no problem. For any of the N/A setups, mail-order tunes are very easy to do. We average 15-20 each week, and it can save you some money if you don't want to mess with a dyno tune.
Let us know if we can help.
Trevor
Texas Speed & Performance
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- '61 Chevy Parkwood 9-Passenger Wagon: Currently Under the Knife : TSP 750 HP 6.2L LSA Engine : Roadster Shop Fast Track Chassis : Mini Tubbed
- '69 Camaro Convertible: TSP 700 HP 6.2L Supercharged LSA Turn-Key Engine : T-56 Trans
- '69 Camaro Project: TSP 700 HP 6.2L Supercharged LSA Turn-Key Engine : T-56 Trans
- '55 Chevy Bel Air: TSP LS3 376 CID Turn-Key Engine : 4L60E : Art Morrison Chassis : Fikse FM5 19" Wheels : Vintage Air
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