Balance Problems...Vibration......

The 340 is date coded 1970.......don't know if it's steel or cast......all I can say without beginning a more thorough investigation is that it's bored .30 over, has a 480 Mopar cam, Holley , internals, Edelbrock Heads, all new internals....no expense spared...

You guys have spoken to a few possibilities that we haven't had a chance to check yet........ Tuesday was the cars maiden voyage..... 2 hours out and back........

We'll check the plugs and wires to see if there's anything obvious, check the motor mounts, and try to find out from the receipts we have just what's what in the flywheel department..............if I can't find anything, I'll crawl under and check it myself........... I was worried at first that a weight flew off the flywheel or something........

YES, by the way, "at idle" means at a standstill in park or neutral.......

One more interesting note....... The vibration is WORSE (while driving) when forward throttle pressure is applied......let off the gas, even slightly, and the vibration lessens in severity..........

If you guys have any more ideas, let me have 'em......... I'll get to the specifics in the morning.

Doc :blob: