[Shaun1162]

Nice looking old farm truck... What are the plans for it??

Looks like an HO52 to me as well... Made by Eaton. Real popular in almost all Chevy 3/4 ton and 1 tons up till the mid 70's I think. Anyways, they only have three different ratios that came standard from the factory: 4.11, 4.56, and 5.13. I have a C-30 with an HO72 (basically the same thing) that had 5.13's originally... Pretty annoying trying to go down the road by todays standards. Swapped it to a 4.11 and it was a pretty big improvement. Still geared low compared to nowadays, but still pretty comfortable around 50-60 mph.