9.25 van rear end in 1969 a body

i have an 8 1/4 rear end with 3.21 gear and auburn posi unit for sale $400. soon as i built it. i went to a local junk yard to get a front disc brake set up someone told me about. i saw it had an 8 3/4 up under it too. the car had i fiberglass front clip and cage, the hole 9. i only paid 250 for the rear end. it had a 4.56 w/ posi and green bearing. i caught the deal of a life time.