What diff should I run? at present the car has a 8 3/4" with a suregrip & 3.91:1 gears but I think I should be going to a Dana 60 & have been told just about any mid 70's-80's Dodge & Ford 3/4 ton only truck or van will work.
So. . what do I look for, what do I avoid, what brakes, what type of lock up etc, remembering that this car will need to be able to drive on the open road & aroung town when required.
