All Uni's are good?
Most unmolested Ke/Ae I have seen have a small spacer ~2-3mm on each side of centre bearing mount from stock..
What sort of distance does it need to come down?
Not sure about the AE86 gearbox xmember, could be your issue.
SamQ T50 gearbox spacer? Its like 10mm spacer that fit between gearbox mount and xmember, might do the trick.
EDIT: I don't see them on SQEngineering site anymore, but he used to make them.
SQ Engineering T50 G/box spacer, tilts engine so the quads don't foul on clutch master cyl.
Shot at 2012-09-12
I do see he makes and entire T50 to corolla X member