Can someone tell me what the difference is between a 7023055, 7024055 and a 7025055 other than they are 63, 64, 65 and are for a stick shift.
thanks Brad

 

This site & its accompanying document demonstrates both 3055 & 4055 were both 215cid & 330cid applications during the 1963/1964 model years. It lists the 5055 applicable to only the 1965 330cid model year. It lists part numbers & delta between 1° & 2° jets w/ illustrations.
Delco Carburetor 1949-62 OLDSMOBILE