[mickmate]

All aluminum FE 452 stroker with I believe Eagle rotating assy, Fidanza aluminum flywheel, Mcleod clutch. Motor has been balanced and dynoed by the builder and has 450 miles on it now.
The problem is a vibration that seems worse with higher RPM. It is really noticeable at 2100 RPM on the way up the rev range in any gear. It is downright awful at 2100 on the way down through the rev range where it really shakes the car and rattles the drivers side pipe. It is the same in all 4gears. It seems to be getting worse or at least more audible. Has anyone run into this problem or do you have any suggestions on what I should be checking. Thanks FE gurus.