American Muscle : Pontiac’s 421 Catalina
Pontiac’s 421 Catalina Super-Duty engine debuted late in the ’61 model year as a larger version of the SD 389. Neither engine, however, was factory installed. Instead, the components were
Pontiac’s 421 Catalina Super-Duty engine debuted late in the ’61 model year as a larger version of the SD 389. Neither engine, however, was factory installed. Instead, the components were
