Here's the scoop. . . my new 66 Nova has a 355, mild cam, making around 350HP, not a rocket ship, but enough HP to move a 66 Nova. The tranny is a TH350 with a shift kit. Under normal street acceleration, the tranny shifts very quickly, shifts to second at 10-12mph, shifts to third at 20-25mph. The shift is very hard no matter what speed. I should mention that this Nova has the original console, which will not allow the shifter to go into first, so the first to second shift is by the tranny in all situations. From a dead stop, holding the brakes and launching at 2,500 rpm's, the car performs great. Under WOT, the shift from first to second and second to third is at 4,500/4,700rpm's. Just taking off from a stop light, the car is a dog until it reaches about 2,000rpm's, then it pulls hard. The shift from first to second and second to third is always hard, and always produces . Is it possible that I have a mismatched torque converter, or do I simply need to have the transmission shift pattern adjusted? I recently checked the rear gear ratio by jacking one rear tire (no positraction) off the ground and two revolutions of the wheel produced just over 3 turns on the drive shaft, which I would assume to be 3:08 or 3:23?