Hey Big Chev, my '53 3600 has a Dana 60(8-lug)out of a '68 Ford. Width is real close to the original. Had to move the spring perches and shock mounts,adapt the brake line and drive shaft.Also needed big center hole wheels.Ratio is 3:70, much better than the stock 4:56 and I believe could be changed out to most any ratio, or posi. $$$