CAST numbers are ID for the casting itself. The only numbers that will translate to the vehicle or application will be either a tag (this carb would have had a tag) or STAMPED numbers.willowbilly3 said:Small base, that would explain the earlier number but according to the 2 reference articles the cast numbers in a circle don't jive. Maybe they had the tag AND also cast the numbers in.
Your small base carb w/divorced choke was used from about '55 until about '68, it was used w/a different choke arrangement later (~1973), on the 307 SBC.
I agree the CK22 kit will be the one to use, no doubt.