A friend of mine has a 440, rebuilt, stock stroke , forged crank, stock rods,6 pak pistons, closed chambered iron heads 509 MP cam, professional products vibration damper, balanced and blue printed, engine builder supplied a B and m sfi flex plate with the notch which they also modified when the balance job was done. Has an new TCS convertor with no weights. It shakes the steering wheel, console etc., even at idle, and increases with rpm. I Swapped in the B and M sfi flex plate with no notches, thought this would cure the problem, but it made it worse. Any input would help. THANKS in advance