I have a 8.8 in my 64 Fairlane that started out in an Explorer, narrowing 2" with 9" axles, carbon fiber cluch kit, Moser yoke and the cost of the used assembly I have $900 in it. The thing I like about it the cost and availability of parts.

I have a 8 3/4 in my Plymouth, the ability to change gears is nice but centers are getting harder to find and are fifty years old.

I'd go with a Dana, Ford 9" or 8.8.