Took me five flywheel housing before I found a good one..three early's, a late reinforced and an aftermarket one no one can identify(Ill post up a picture tomorrow) one of the early ones had the cracks pinned and it ran out at.003... I was going to run it till I found a late reinforced one,uncracked that dialed at .002..the only way to crack check them is to bead blast them..good luck,its critical to smooth shifts and vibration reduction.
B flywheel checked at .001,balanced with clutch.