[Voltaire]

The car previously had a 302 roller in the same configuration. The bell housing, transmission, ujoints, drive shaft and rearend have not changed and there was no vibration previously. When I changed the engine I went to the new clutch. I reused the flywheel (after having it resurfaced). The input bearing is new and is the right size. The throwout bearing is also new. The harmonic balancer is a new one. The rotating assembly was balanced with flywheel and harmonic balancer at a builder here in phx. I just bolted the bell housing up as the bell housing were never removed from the car. Before pulling the transmission I will try some of the other easy suggestions to try and identify the problem. I need to see if the harmonic balance has gone bad, I believe this can be checked by checking timing.