Fireball Roberts set the pole for the 1963 Daytona 500 at a speed of 160.943 mph. This marked his third consecutive pole position at Daytona with a Pontiac.
The average speed for the 1963 Daytona 500 was 151.556 mph.
Pontiac 421 equipped cars finished 7th and 8th, ahead of Smokey Yunick's 9th place 427 Mystery Motor equipped car, who had defected from Pontiac to Chevy that year.
500 mile NASCAR race with average speed of 151mph, is a 3-1/2 hour race.
Using factory forged GM SD421 rods.
That requires sustained 6300rpm engine speeds for 3.5 hours.
Vintage forged, heat treated, USA-made connecting rods are not weak.
The SD455 rod is even stronger.
Last edited by GTO-relic; 11-11-2025 at 04:06 PM.
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