Is 5.13:1 the only ratio the early ones had? I have been thinking that my 51 gmc 1 ton sports 5.38s. I have found a chunk from a late 60s pickup with 4.11s so I'm fine there, just curious if the 5.38 is a possibility.
Thanks


1951 GMC 250 Open Express
1968 C10 Suburban
1971 C20 Pickup

My Dad told me "Son, never hit a man in anger- unless you're certain you can get away with it"