Yes and it adds credit to their success, I mean, to run F1 and CanAm programs at the same time back then was a real logistic challenge in itself!
I agree, Jim Hall was a genius, like Chapman, Neway, Murray. Check that car, just amazing:
But I think he was some sort of a one-man-team, with not much support as he was probably the only one with good knowledge in the States.
The Chaparral 2J at Watkins Glen in 1970.