Dont know if its in your budget but i have a mint gsr hydro tranny with a obx diff field stripped and instaled by me with correct shim.It was in my 438hp coupe and ran mid 11s with no issues at all.I was going to keep as a backup but need to get rid of it.The tranny has about 80.000 miles and the diff has like 5000 miles looking to get 700$ lmk