8&3/4" mopar vs Phord 9" vs xploder 8.8" rear

If you can't get a 8 3/4 get a 9" from a late 70's Lincoln. These are the same big heavy duty rear used in trucks and rancheros. If you get the Lincoln reared it should already have disc brakes on it and if I'm not mistaken those rotors are vented already not solid.