I think if you can make something that didn't come with that vehicle that is cool, aslong as you don't take parts from certain brand x vehicles. But if you are looking for a 8.75 rear end I'd look up www.texasacres.com is it right up the road from you in Killeen, TX. It is a all mopar "junk" (since when is anything from a Mopar junk)yard. I don't know of any 8.75s that had disc brakes but they make kits and adding those would be like putting a Ford rear end in a Mopar, you are putting something on that was not there originally.