I just dropped a 327 motor into my 67 convertible. Its on a powerglide. Almost done tweaking it but i'm getting some shaking when i put it in drive and reverse. Could i have done something wrong at the flywheel? In park she runs great. Timing is good.Thanks in advance for any input.

Drive shaft could be out of Phase (need to rotate it 180 degrees). Also on the 327 there are two harmonic dampers so it is possible to put one on the front of the motor that is unbalanced; (but it would vibrate all the time, even in nuetral).

Big Dave

Spark plug wires crossed serious vacuum leak also possible.