dan
to be honest if your runnig about 350bhp the normal T5 will last
if your runnig abit more power than that , then the T5 could let go any time it's just pop luck if it lasts or not
the Mt75 rwd gearbox is a striaght bolt in but i think you have to mod the propshaft , you also have to go a a 4wd starter motor
you would still be looking at 3k for the striaght cut box (syncron and a bit extra for the dog version
cheers marco