Redneck budget a-body rear end???
you going to convert it to 5 lug? and what discs are you talking about, explorer discs? i know my 80s mustang had drums. nothing wrong with the 8.8 as long as it is an 8.8 some of the earlier mustangs had 7.5"s or something like that. your going to have to ditch the 7 1/4 and step up to the plate with some decent rubber one way or another.