Actually both,,,,,
It was Engine Dyno'd
Then, the Bear Dyno
The stock 273/235 HP, valves floated out at just over 5200 RPM.
In 1967, we ran it in F/Stock (12.50 - 13.99 Wt/Hp). Completely stock,
4-Speed with 3.23 Sure-Grip Posi.
Just barely got into 4th Gear at the Traps.
Best E.T. = 16.16
Best MPH = (I have to look up the old paperwork)