I have a 87 305 ccc carb 5 spd. and am currently swapping for a 350 tpi. I have all the parts I need from an 86 305 tpi auto trans am. My only problem is figuring out the wires from the ecm harness to the body harness. they splice out right after the ecm and have 2-3 conectors. I was wondering if anyone knew if these conectors would just plug in or if I would end up splicing. and if that was the case if anyone could send me wiring diagrams. Also if anyone knows if the spedo will give me trouble because the ecm is from a mecanicly driven one and mine is electronic.

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87 TA 350tpi 5 spd.

 

If you have the complete harness from ECM to TPI:

Plug & play...!

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).