I just put a 4:11 ratio rear pig/pumpkin in my 51 chevy 3/4 ton have not run it on highway yet, it came out of a 70 3/4 ton chevy my 3rd pig removeall first 2 where 4:57 same as I had.
1967 to 1972 3/4 or 1 ton with automatic will bolt in. Also it is said some surbans with big block motor and automatic trans came with 3:73 I took the back cover off 2 but the # on the pinion shaft told me they where also 4:11, still looking. hope this helps Bill
