lightweight rearend

[tgvettes]

I just bought a 68 Camaro that I am working on the planning for right now. I want to keep the car as light as possible. My planning goes something as follows.
LS3 GM Crate with the hotcam from the factory 480 horse or something like that I think it is rated at. T56 Transmission. How much rear end do I need (remember one of my goals is keeping it light) I was thinking a built 10 bolt 8.5" rear (2nd gen Camaro or 72- newer Nova). It will always have street tires (335 most likely) Do you guys think I should be okay with that rear or do I need to do something more stout as a 9" with Aluminum carrier/housing, 12 bolt Chevy I think is way to heavy.

Tonny