Where u located?

If that ls2 is gonna have 500hp be sure to get a fully trans from a reputable builder, or do the 80e conversion and be done.
Eaton or similar posi is needed. I think Yukon has some slightly better axles if u want.
Might wanna consider a high speed 5" alum shaft as well.
Adds up quick!
What color is that LS2 crank sensor?