I can't say beyond a shadow of the slightest doubt that it isn't Unser, but in '66 Roger McCluskey was the USAC National Sprint Car Champ with 770.5 points and Mutt Anderson won the car owner championship with 770.5 points for the H & H Machine Tool Spl. #51. Coincidental? I dunno. :confused:

Ref: Carl Hungness' USAC Sprint History 1956 - 1980