Rear end for big power?

[84_GT350]

I'm planning on pushing near 600hp with my future turbo setup and I want a rear end WITHOUT C-clips that will hold up. Problem is that the car will see 99% of it's time on the street and C-clip eliminators will leak. So I put in a call to the guys at Currie and they told me they could build me an 8.8" rear with 9" ends and all the 9" axle retention hardware, 31 spline axles, a Torsen differential, and 3.27 gears for about $1800 (a complete setup less brakes). This sounds like it would fit the bill very well. What do you guys think? Think that's a good price? Anyone see a problem with using a Torsen differential?

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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