Item # 1909343A 39^51
This is the vacuum advance with the bracket and timing mark that is 90 degrees to the vacuum chamber. The bracket is riveted to vacuum canister.
This part fits most 1939 1940 1941 1942 1946 1947 1948 1949 1950 1951 Chevrolet Cars; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.