Most likely the carburetor was commercially "remanufactured" at some point.
Look at the main airbleeds and see if they drove brass inserts into the .118" holes?
Most "remanufactured" carbs will also have lead driven into the idle bypass air passages in the main casting as well.
All factory jets and metering rods were stamped to identify them.
Most jets and rods used in "remanufactured" carbs are not stamped or marked, and ALL of their calibrations are "generic".
This cut down on the amount of parts they had to stock, and the hourly workers could just drive the same parts into nearly every casting......Cliff
