I have a WC T5 out of a 90 GT.  I was going to use it in the 86, but have gone in a total different direction.  It shifts good, no issues.  Has SBF bell housing, and comes with a slightly used clutch/pressure plate, block plate and a flywheel(needs to be surfaced), and a crossmember.  $350 pick up only.  I have a fox pedal assembly for extra $ if you need it for conversion.