How to modify an 8.8"

[84_GT350]

But I can't use a spool on the street. It'll wear out the rear end hardware too fast. I had already planned on a 31 spline differential...but I wasn't sure if there are any out there that can hold the kind of power I wanna make.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s