Stock flywheel (unlightened) and stock type LUK clutch set. The flywheel and the pressure plate were balanced with the rest of the reciprocating assembly. No change in vibration when clutch is depressed.

Problem here is I have no frame of reference and no friends with A series engines. This is a simple 4 without a balance shaft. Maybe this is what happens when you stuff in a 262 duration, .425 lift cam. Just doing some research.