The Carter W-1 used a tag attached to the top of the carburetor. The carburetor number would be stamped on this tag and looks like xxxS. That is 3 numbers followed by a S. When the tag is missing watch the video below to identify the correct carburetor kit.
Watch a video about how to determine which is the correct kit for your W-1 carburetor.
Oldsmobile 2 float bowl screws showing. Vacuum port on the Carter W-1 stamped side. Carburetor Kit K4062
Studebaker 2 float bowl screws showing. Large brass nut on the top of the inlet. Vacuum port on the Carter W-1 stamped side. Carburetor Kit K4062
Chevrolet 3 float bowl screws showing. No vacuum port on the Carter W-1 stamped side. Carburetor Kit K4062
