Correct Axle Housing Length to Fill Wheel Well of '74 Scamp with Widest Slicks Possible Without Cutting Structure

I agree, and I am just not quite ready to do a mini tub on this car, though if budget were not an issue I might just go that way. I am thinking I will put a Caltrac suspension on it using the Dr. Diff 1/2" Offset bracket, and have the axle cut down by 1/2" on each side to bring the wheel just a bit closer to the inboard. That should be a good conservative approach that takes advantage of all the real estate available.
That seems like a lot of effort for 1/2 inch. It would be hardly noticeable in the wheel offset.