Ron,
I was looking for a 3.73 rear axle when I changed over to the T-5, but couldn't find one, so I got a real nice 4.64 limited slip one from the Pick n Pull for a hundred bucks. It's a Japanese clone of a Dana and fits the truck perfectly. Correct width and Chevy 6 lug bolt pattern.
The 215/85R16s that I went with really dialed everything in in all 5 gears.
Now all I need to do is pull a stump and see if I can drag it down the road doing 65 MPH and still get 18 MPG.
