I do have the truck, and the wheels and tires will be here early next week however it will not be as easy as tucking the wheels under the truck to determine the rear end size. Just to get the tires under the truck modifications will need to happen.
The Wheel wells and frame would need to be cut just to get things under the truck.
My goal is to use a spare frame and do all the modifications to the frame. At a later time I would cut and set the body on the completed drive train.
You make an interesting point. "Be sure to get the pinion offset correct for the car that it will be going in."
It sounds like you are saying that just because it is a ford and you are using a ford rear does not necessarily mean that the pinion offest is correct.
Broncos come with Ford 9" however If I went with a used housing that was already narrowed it could be cut with an offset to match another vehicle type correct?
This is definetly something I did not know.