Always amazes me when Dick's run keeps coming back up by folks trying to run numbers 40 years later...
Lot's of stuff went into the speed achieved. Boghosian will tell ya it was his fantastic damn motor and Dick was just along for the ride. Dick would say it was his balls and that when you run for the championship, it doesn't what Joe gave him since it was going to be junk when he was done. Taller firestone tires cuz Goodyear was screwing with him, the lowered front, the vents, the long straight used in the Daytona road course in those days...
...and the Ford guys who said they had him clocked at over 200mph regardless of what France, et al said.
Having flown with him so much decades ago, I'd say them balls of his lowered the front of the car just enough...