I agree Carb king will have the answer. He also sells kits. They probably use the same kit. The difference is in the jeting & carb kits don't have new jets anymore. It is probably a California truck. The other states didn't use that system until 68. Or the engine was replaced with a newer engine at one time. Is it a Roch. model B carb or a Monojet. If it is a MJ the number is stamed on the side of the bowl section.
Last edited by Wrenchbender Ret.; 01/04/2015 4:41 PM.
