Does anyone know the difference, if there is one between a ford 60 and chevy 60 wheel mount surface to wheel mount surface? I now know that 78-79 ford 60s, although 35 spline necked down the inner axle shaft, just like older chevy. are newer 60 axle shafts the same way? If not, will this 78-79 housing accept the larger axle shafts? thanks, Brian IT'S A 1 TON THING.... IF I HAVE TO EXPLAIN IT, YOU WOULDN'T UNDERSTAND!!!