8-3/4 or Ford 9 inch???

Hey guys,

I have been looking for a 8-3/4 suregrip rearend for my 71 scamp and have come across an amazing deal from a member on the site. However, i have heard alot about guys using Ford 9 inchers on their cars and was wondering what its benefits are? I am not that keen on sticking some Ford stuff under my ***, but I am on a really tight budget to build a quick street car, and with the rising prices of 8-3/4's i have seriously been considering using the Ford. Anybody here use the Ford 9 inch? Are they cheaper and easier to come by? if so, what vehicles can i find posi ones in (hopefully ones that won't need narrowing to fit under my 71)? Any help on this would be great guys

thanks8)