8-3/4 or Ford 9 inch???

One other problem with the Ford 9 inch: because of the angle of the pinion, which is less than ideal, there is a power loss with a 9 inch. If you check the power at the wheels on a dyno and then swap in an 8¾ or a Dana and check it again you will find that the 8¾ and Dana deliver more power to the wheels. Not an huge difference but it is there. My car has a B body Dana 60 in it. Gear changes are far more involved and expensive but it is nice to know I couldn't blow up my rear unless I used a bomb. A BIG bomb.