[eville]

Originally Posted by DWC

Thanks for the responses.

I verified TDC with a piston stop a few months back (must have forgotten to mention that in my posts). I check/verified the crank keyway was good when I installed the new balancer over the winter.

I've also run it with the serpentine belt removed with no change in vibration.

I'm leaning towards just sucking it up and having another 383 built by a local shop. That way I'll have known engine specs/parts and local support if needed.

Live and learn...

Daniel

I'd tear into the motor. I bet that crank is jacked up somehow or the timing chain is a tooth off maybe?