Ford model 4100 carburetor were produced from 1957 to 1969. It is an aluminum four barrel carburetor used on various Ford, Edsel and Mercury vehicles.
The 4100's venturi size is cast in the driver's side of the float bowl.
Carburetor identification numbers are located on a tag was attached to a bowl cover screw.
Ford carburetors are often refered as Motorcraft or Autolite.