Ford 9 inch, pro's and con's

First, will the car always be a /6 car? If so, Why not an 8 inch Ford rear? Those are a dime a dozen in Falcons and Comets, and way stronger than an 7.25 and SUPER CHEAP. My friend just gave one away.

Second, whats the width of the 9 inch you bought?

Falcon/Comet (and some other old little ford cars I think) 9 inches were pretty close to A-Body width (although very hard to get a hold of, much like an A-Body 8.75), some guys snag those and just get the correct Mopar spring perches in the right location.

To me the point to be made is this: are you going to have to narrow the housing at all? If so, you will be into it damn near as much as an 8.75 and then you have a heavy *** rear end. The weight difference is noticeable when you pick one up. If you aren't concerned about weight, then go for it if it will be a more affordable route.