Skicker knows, I got a lot of the parts from him. The rear diff is an '87 9 1/4" with 3.55 trac lock, front is a Dana 44 and has 3.54 gears. That big block 727 trans with the short tail was actually built by our good buddy Jim Kennel (RIP). He took the short tail from a small block 727 and put it onto a big block 727 case so the divorced transfer case could be used.