Just to be clear I need to remeasure my housing (supposed to be an A body) and order big bolt A body axles right? Not BBP B body. Stupid question I know... Just tired of buying the wrong stuff lol
Yes. BBP A-body axles. Based on your description of the installation, and the fact that you have re-drilled SBP axles I'm pretty confident you have an A-body 8 3/4. A-bodies were the only ones that got the 5x4" pattern. But just to be sure get yourself a backing plate to backing plate measurement. Then call Cass @DoctorDiff so you can tell him what you've got, just to be sure (vs just placing an online order). He'll know what you need and the right questions to ask before he sends something out. He will ask, but sure you tell him you want the axles to work with the 10x2.5" BBP brakes you got from your 8.25.