8 3/4" How Strong?

go with the 9 inch Ford , again as stated parts availability , strength ,gear ratios in increments of 10 to help tune your car for the track you are on ,,, the Dana has its place but gear ratio selection is very limited and gear changes can be time consuming . Nascar is an excellent example of what the 9 inch can handle 500 miles at more rpm than your car will ever see as well as the punishment on the road courses they run .. do it once and do it right ,, Moser , Strange etc. can build the complete 9 inch housing / axles and carrier you need ,, i suggest you go with 35 spline axles with a 35 spline Detroit Locker to keep the car street worthy.