i put a 700R4 behind a goodwrench 350 driving a 3.08 posi in my 75 Camaro. that car is right around 3600 lbs. its a good set-up, but my tires are only 24" so its geared a bit lower than the truck would be. the 200R4 is weaker but it suggests the ratios would be OK with the V8. i really like the OD/lockup.