Need-More-Boost

So I have a rear end out of a 2000 trans am ws6 (auto) that i am currently working on for our school project & i need to know Some specs on it.

What Gears?

Posi Trac/ Limited Slip/ (etc.)

Or even the size of it would help?

Anyone know of any websites?

FirstYrLS1Z

iTrader: (4)

auto could have been 2.73-2 series or 3.23-3 series,count the number of pinion rotations to turn a wheel once.
2000 would have had a 'Torsen' 'Posi'.
gear size would be classified as 7.625,uses the same carrier as the 7.5 10 bolt.