Original Rear end type on my 70 Duster

My 70 Duster I had in high school was a 318/904 car with factory front disc brakes, and it had a 7 1/4 in it from the factory. When you have a 7 1/4 rear end, don't do a boot leg turn in the grass and let it catch the pavement. The 7 1/4 will go KABOOMYOW! Don't ask me how I know! :eek: :BangHead: