Mopar Madness rear axles??
Since you are on a budget... Are you incapable due to you disability of putting/bolting this stuff together?
If you can bolt stuff together, here's what I would do.
I'd find someone that is selling a complete A body 8.75 with ANY case and good 3.23 gears, swap in the tru trac/carrier bearings, buy BBP axles and brakes. Sell the SBP axles and brakes and be in around $1500 before painting.
Those tru tracs are EXPENSIVE! Like $600ish last time I checked.