This original carburetor is for a Chevrolet Camaro Chevelle Buick Pontiac etc. cast iron spreadbore intake. It is a double pumper and has mechanical secondaries. It uses the heat coil spring intake choke. List number is 6210-1. It is a complete core with no missing parts; however, I do not have the rod that goes from the heat coil spring on the intake up to the choke lever. These carburetors are kind of hard to find because they were not widely used. Those of you who use these carburetors know that new ones today can list anywhere from $600 to $800.