[JLMounce]

If you are going to buy a new rear-end for the car, get that BEFORE you buy new wheels. Pontiac track widths vary from their chevy counterparts for which those new axles are going to be based around. Adding things like disc brakes further change total hub to hub distances.

Do those items before you buy wheels so that you can measure properly and not find yourself in a situation where you may have just put tires on a set of wheels that cost you a couple grand, only to find out that they don't fit.