8.8 rear in my A-body. I cant be the first!

your overthinking it. just go get one and stick it in the car and be done. i know i am not the only one running one in an abody that is not narrowed. if you want to run bullits for them being cheap they are 5.72 b.s. if you narrow the rear they wont work. there are wider ones available, there are also ones made for earlier mustangs with a little less backspace, i personally wanted the same size tire all around so i could get a std size spare, say a donut from a a mustang, and i could rotate my tires front to back, to me that was more important than having a big wide tire out back. are you moving springs in? minitub?