Re: what is difference between 8" and 9" rearend.
Well I was answering you on your other thread and now I just think that best thing for you to do is to describe what your plans with the car is.
If you are just trying to get a 5 lug pattern in the back then i would suggest going with an 8 inch out of a mustang falcon comet ranchero that came with 5 lug pattern.
If you are trying to do a little street strip action I would go with an 8.8 or 9 inch as they are stronger and proven rear ends that can be built up to handle anything.
1964 falcon futura
351c powered one day 302 in it right now