Umm,........and he may cause you some greif too!!!! :y:
What Mikey has told you there is not complete correct, although he slightly touched on the problem.
T series T50 (from TA22 and TE72) have a forward shifter position (like a ke30/55) and a 20 spline output shaft.
A series T50 (from AE71 and AE86) have a rear shifter position (like a ke70) and a 22 spline output shaft.
So if you were to put the T series T50 into an A series car you would need to change the spline on the tailshaft, and cut the hole in the trans tunnel further forward - possibly causing a world of greif with the lower dash!!
Alternatively - Track down another A series T50 and it'll bolt straight in with no extra work. :y: