These carburetors were new 61+ years ago. Most if not all have been rebuilt, and for various reasons the original carburetor was replaced with something else. The 7RT (truck) and EAB (car) are identical (except for the top) as to the basic castings, inside and out.
Should also mention, a lot of these carburetor bowls/tops were mismatched by do-it-yourselfers and big rebuilding houses alike.