Once I get a job outside of high school (hoping for an internship at a classic car restoration shop) I can actually start spending 1000 on a rebuilt 8.75. I was looking into getting a 9" from like a bronco or something like that because they come with 4.10's already. (if you can find the right one) However, converting it to an a-body is what costs the most. When I was really into looking at rear end alternatives, doing all that to a 9" would be only like 200$ less than buying a fully rebuilt 8.75 with whatever gears I want. There is a guy that did all my friends rear ends (leave it karl) for 1000$. But for now I am trying not to scatter parts. Because I don't think the gear oil has ever been changed.