Used crankshaft pulley for 1939 Deluxe, 1940, 1941 passenger and truck with Flathead Ford V8 except 60HP; Ford part Number 91A-6312-A.  Has one wide sheave and NO fan flange; nice seal surface; use this for installing on 39-48 engine in 32-34 frame to gain clearance at the front cross member and run the fan elsewhere