Is your vibration in the valvetrain itself? Or is it the engine vibrating? I'm not familiar with that cam, how much lift and duration does it have? did you use the old valve springs? If you did , did you check the valve spring height? have you measured across your rocker studs to see if one might be pulling out? Have you put a vacuum guage on your engine and checked your vacuum? just shooting in the dark but maybe this will help. Later/GRABBER
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