I picked up an 8.25” diff out of a suburban today. From my measurements I think it will work for the awd swap. Yes I know I need to swap out the 4wd axle shaft/tube to the awd version but I will do that later on. I need to figure out my cv situation. I grabbed one of the cvs from the burb to test fit. Since it is 33 spline and my zl1 hubs are 33 spline maybe they will work together. If the diameter is different then it will probably require custom cvs. I’m praying I don’t need custom ones, they will run me some serious $$$.