Either a ford 8" but I think it's a 9" If you can't get at the bottom bolts straight on it's a 9 inch if you can get at them straight on it's an 8 inch Sent from my iPhone using The H.A.M.B. mobile app
Looks to be a 9" 8" 9" 2 x dimples in rear cover and stamped area to clear crown wheel. Flat area to lower left of right dimple is where filler plug goes.
ok....i know the car , do you have it now? it's an early 1966-77 Ford Bronco 9" rear and it's on Weedeter springs