My friend that did the swap in his Z32 found that his flywheel needed to be spaced slightly to allow for the starter to engage:

He fixed the problem by using the stock Q45 flexplate spacer between the crank and flywheel. But he still spaced the throwout bearing and made a custom pushrod for his slave cylinder.
I'm not either of those things being necessary--it looks like the stock TOB spacing should be VERY close and no spacing/adjustment necessary. Was my friend's work redundant?
