Get ahold of Sinister Drag Designs for info on this. They have one in a Riviera and I think working on fitment for one in a GP but it is not exactly a bolt-in trans and is a lot of work to make fit. This may be the way to go for high HP builds and worth the trouble after some testing is done. I may try transplanting one in my gp test toy if I ever get a free minute to work on my own stuff