4dr4ever,
If you're looking for the cheapest rear end, our local pick your part has Ford 8.8 rear ends from Exploders for 80.00 on their half price weekends. The 8.8 is as strong as the 8.75 and comes with a trac loc and 3.73 or 4.10 gears. 95 and later cam with disc brakes too. They are 59.5" wide from hat to hat so they will fit under an A-Body without cutting. At some perches and your good to go.
Regards,
Joe Dokes