The ARDUN heads were originally designed for garbage trucks because the OE flatheads didn't have enough power.

I've never understood the infatuation with the pre-war relic platform. Seems like a lot of trouble for little horsepower.

Then again, people still race horses...

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.