Almost 20 years ago I followed the HP Pontiac Magazine article and installed a 200-4R in place of the T400 in my 1967 GTO and contrary to what a lot of people on here say I have never had any problems. Used ShiftWorks kit to modify original shifter. Installed new yoke on original driveshaft. Transmission was built by BowTie Overdrives and they talked me through the adjustment of the cable. In fact they insist. I couldn’t be happier. Oh, by the way, engine makes 600 hp.
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