Zac_F71's 71 Demon

ok guys got a few questions - I picked up a 68 8 3/4 housing out of a Road Runner can I leave the spring perches at 44" or should I have them done to 43" like the A bodies are? This rear housing was flipped at one point cause the bolt for the brake line is on the pass. side facing the ground (supposed to be driver side facing the body duh)

Also could I get B body axles and have them cut and resplined to work with the A body brakes? (A body backing plates have a deeper offset than B body ones) SO I'm wondering if I use the A body backing plates and custom axles I won't have the wheels/ tires sticking out of the wheel well - I'm wanting to fit a 15x8" or 9" wide w/ 5.5" BS on the car with a 275/60 DR


EDIT now that I think about it the housing I have will have to be drilled on the driverside for the brake line hold down bolt... so that along with re welding the perches to 43" has to be done