This photo is from Carmen Przekwas, the better half of Starfire Kid Bob Przekwas. It features Bob Eastman on the right, Dalton Lisell and an unknown person. It was taken in the back of the factory race truck (now on display at the Snowmobile Hall of Fame), and the pair is working on a 1973 suspension, in 1976. You can tell the photo is from the 1976 season because of the jackets. Also in 1976, they used heavily modified 1973 Starfire Suspensions in the 1976 SnoPros, because they were lighter than their 1976 counterpart.