Well if it ran good before and all you changed was the flywheel and pressure plate I’d pull that off and have it balanced. Good time to run it without the flywheel too. Was it a McLeod flywheel?
It would suck to build a new engine and find out you still have a problem.
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Steve
'68 Camaro - 355", TKO600, SpeedTech Arms, ATS-AFX Spindles, Hotchkis Springs, Forgeline Wheels, C5 Brakes (Kore3), Holley Terminator EFI
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