It's an 8 3/4 with Moser axles, and I also upgraded to a 3.5" Dynotech driveshaft with 1350 u-joints over the summer. I suspect the ring and pinion might be the next to go, at which point it'll either get an aftermarket 9" or a Dana 60. It will definitely be the next weak link in the drivetrain. I know at this weight and HP it is marginal, especially on radials. For the brakes, Wilwood didn't have a weight specification and it's a kit designed for C bodies. I have a set of '73 C body disc spindles I could've used but I can't find caliper brackets.

The trans is a 727 with a Cheetah reverse manual valve body (no low band apply) that I shift on the column. I don't ever get off and back on the gas in 1st gear, and also know if I break the rearend I'll have to pull the trans to check the sprag.