so i already got my gears and im thinking im going to go ahead and throw in a Eaton differental while the whole thing is tore apart just to make it that much better. prolly going to do a set of axles as weel since i will be launching from a set of sticky tires and a good suspension.

so my question is which route should i go with this? Eaton posi or is Auburn better? 28 spline or 31? which girdle should i go with: UPR($109), SHM($189+$40 for the studs), or a steeda($139)?