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1973 Pontiac Firebird SD455 drag racing 1961 Pontiac Catalina Super Duty 421. Pure Stock Muscle Car Drag Race. Factory Stock Drag Race. First car is a 1973 Pontiac Firebird with a Super Duty 455 V8 (SD455). The other a 1961 Pontiac Catalina with a Super Duty 421. The SD455 in the Firebird was rated 310 NET horsepower, and the Super Duty 421 in the Catalina was rated 373 GROSS horsepower. Both cars have 4-speed manual transmissions. Rear gearing in the Firebird is , while the Catalina has . The Firebird weighs 3894 pounds, which includes the driver. The Catalina has a curb weight of around 3800 pounds. Pure Stock Muscle Car Drag Race (PSMCDR). FAST Factory Appearing Stock Tire factory stock. Super Car Drag Race. Remember, both cars participate in the Pure Stock Muscle Car Drag Race series, so please check out their website: Also make sure you find them out on Facebook. The rules for PSMCDR are listed below: For 1955 to 1979 musclecars built in United St
