[Kramer]

I am helping a friend with an older super performance and a 460 Ford ...recently we replace the clutch and flywheel and the shifter is shaking badly at higher RPM....i'll talk to folks at TREMEC (TREMEC 3550) and we replaced a part of the shifter boot inside the shifter assembly as well as the pilot bearing inside the clutch and attempt to fix this but we can't figure out why it still shaking

Any ideas???