Just trying to plan my build up.... and I want to use the 8" rear, but want posi, trac-loc, auburn, locker? rear. My car currently is a whon wheel wonder, and in looking for a third member the prices for a whole unit are out of my current reach. So what I am asking is for advice on wheather or not I can buy the guts and put mine together with what I have. It it possible? Thanx, Mike.