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I'm not 100% sure but it really does look like famed drag racer Hayden Proffitt fron California. Here's a Grant ad from 1967.  He later ran an exhibition rocket drag car.  I recall seeing a 1964 photo provided by Russ Dodge of Proffitt storing his 1964 Super Stock Hemi Plymouth drag car in Elton Hildreth's shop in Vioneland (if memery serves) when Proffitt would come east while touring.  So there's a possible connection to Nazareth and of course Atco, NJ Dragway.

Joel