Scott,
Here are the dimensions.
It's difficult to read the invoice from Speedway for the axle but from what I remember I narrowed the axle 1" on each side as compared to a stock axle with LS disc brakes installed. The measurement I see on the invoice is 59 3/4.
Here are the specs for the wheels. I am also running a 1/2" wheel spacer on the rear. I was nervous of the interference on the inner fender due to the flare so I specifically went conservative on the BS so I could adj with the spacer. With the PS2 test tires the fit was much tighter than the RE11's I'm running now
