Did the remanfucture put in new bushings on the shafts? If it leaks air through them it will not run for S##T. I had a reman for my 1962 and that was the problem.
That maybe your problem too. Check to see if there is any play on the shafts.
62Blue
Don


62Blue
62Chevy in progress
You've never been lost until you've been lost at Mach3" Paul F Crichmore (Test Pilot)