I have an 85 which i am restoring, I debated back and forth between keeping the 7.5" axle or swapping out to an 8.8". In the end, due to budget and simplicity I decided to keep the 7.5 for now. My question is, when shopping for new backing plates, are the 7.5 and the 8.8 the same part? I already verified that my new axles and drums fit 79-93 so I'm 75% sure that back plates are the same but want to make sure. Thanks!