I need some suggestions. I swapped a 413 4-spd into my 64 Polara 5 years ago in place of a Poly/pushbutton. There was a minor vibration, so over the last few years I have changed motors, 4-spds, rear ends, 3 different sets if tires/wheels, 2 different driveshafts, the current one having been rebuilt and balanced, the front end's been rebuilt and converted to discs. I STILL have the vibration! The only parts that have not been changed are the bellhousing and flywheel. AFAIK bigblock flywheels aren't balanced...correct? The 426 wedge in it now runs smooth at an idle and revving in the garage. I don't know where else to troubleshoot. Anybody have any other ideas??? Jeff Adams 64 Polara ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.