[jhv48]

With that 4.10 rear end, first and second gear are going to be pretty low and you're going to have a 1000 rpm drop between 4th (1/1) and fifth (.63/1).

I just put in a super alloy T-5 with a .80 fifth and a 3.46 rear end. I used to have a TKO 600 with the .64 fifth gear. I'm turning 2500 rpm at 70 mph and my engine loves it. No more rowing back and fourth between fourth and fifth on the freeway when traffic slows to 60 mph, which it does all summer long.