a 6l90e will work. my father in law ran one for a while in his chevy II, but it was huge and you have to run low numeric gear ratio because of the gearing in the tranny. a 3.89 was too much imo. ended up taking it out and going t56 magnum. so much more enjoyable!!
John at Speartech has been doing the 6L90 for while and has had good luck with them so far.Anybody with more info why to or why not to use a 6L90 trans?