8&3/4" mopar vs Phord 9" vs xploder 8.8" rear

The 8.8 is junk. Unless you go for the added expense of a c clip eliminator kit, don't even consider it. Why is everybody so gung ho on rear disc brakes? I don't get it. You gonna put an alterkation under the front or sumthin similar? I mean if you're really gonna do the autocross thing, then yeah I might can see all that then. But without the c clip eliminator kit, and a good bit of power, you're riskin you life and anybody else on the road with you. All that holds those axles in is the c clips that slide behind a little button on the end of each axle. They have a nasty habit of breaking in stock vehicles, much less anything with power. Unless you're gonna have a real boatload of power, I say stick with the 8.750. Although the 9 inch does benefit from pinion support in the rear, unlike the 8.750, you will never need it in anything but the highest of power levels. Besides that, there are plenty of cost effective kits to put discs on the 8.750 if it's killin you to have um. I say leave it Mopar.