SD-421 SUPER-DUTY PONTIAC: LIGHTWEIGHT HEAVYWEIGHT!

Swiss Cheese ’63 SD-421 Catalina is one of 14 factory built and held NHRA C/Stock record for a number of years. As the 1962 drag season drew to a close, it was obvious that Pontiac’s position at the top of the Super/Stock hierarchy was weakening. Ford, Chrysler and Chevrolet were gaining on the Chiefs with bigger engines and an ever-increasing supply of special parts, including weight-saving aluminum components and body panels. Pontiac engineers knew they had to have a lighter, more p...
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