If you really have a 261 (would be odd in a 62 gmc), very good chance the carb is a "B." There are instructions on the board for posting pictures. That would tell us for sure.
Does it run ok? The B probably deserves most of the criticism thrown at it, but there are also countless millions of them still working fine.
Last edited by JW51; 12/13/2015 1:48 PM.
