Hello Everyone,

I recently purchased a 1959 Apache, with a 235. I found the following casting numbers on the head/block:

Head: 3836848 GM 4
Block: 3837004 GM 12
Stamped between Dizzy and Starter: 0I47523F56X

I believe this means I have a 1956 235 in my 1959 truck.

My question is, I want to replace the leaking Rochester with a Carter. According to a chart I found on this site, for the 1956 I should use a 2100S, but the 1959 truck should use a 3211S. Does anyone know the difference between the carbs, or which I should use?

Thanks a ton!

Vince