Now I am sure that I am beating a dead horse here, but I just need a definite answer and I can not find one. I have a 1991 Legacy Sport with a 4eat. As the title suggests I need to replace the transmission. It is hard to come across one from a Legacy sport so can I use one of the Legacy L transmissions. Are they still 3.9 just like the sport? If not, would it be possible to simply install say a different tranny and just use a corresponding dif?
Hopefully I won't be burned alive for bringing this up, but I would really appreciate a clean cut answer. Thank you very much everyone.

-Spitfire999-