if im not mistaken, any a-body with an 8.75 in it was small bolt pattern... now small bolt disc setup is getting very hard to find and its EXPENSIVE when you do (i believe there are aftermarket options as well, but also pricey) most peope when they go disc, convert to big bolt pattern...its easer to get and more affordable.. in which case I would consider an 8.25 rear end... that would also be cheaper than an a-body 8.75