[Wizard]

To use a 91-94 trans in your 90 you can do one of 2 things:
(1)swap the cables, and shifter assembly
(2)swap out the bracket on the transmission

89-90 T-cases are 22 spline input whereas 91+ are 23-spline. The outshafts of all T-cases are 21-spline (in other words the propshafts will interchange) Most driveshafts will fit into any 1g trans, awd/fwd/AT/MT doesn't matter.

To use a different t-case (ie, 22 T-case to 23 spline trans) you can simply swap out the output shaft from the transmission. Literally takes 15-20 mintues and doesn't require transmission removal. In other words, running a 91+ trans (23-spline) with a 90 T case (22 spline) just aquire a 22-spline output shaft (I keep 1 of each just for that reason)

Wiz