I sure think it would be fun to run one of these old sleds down the track at Hay Days and just be able to say I RACED AT HAYDAYS!!
An idea to throw at the ASCOA would be to add to their program (I was not there to see it) a feature year race changing yearly and have a heat or two of say 1968 sleds or 1969 sleds etc., I remember going to the races at that time and you would typically see a Doo, Sno-Jet, Moto-ski and maybe a Rupp on the line. I would try to be there to watch that.
Back in that era you had Moto-ski and Sno-Jet Distributors I think right in Forest Lake and those two brands were fast on the grass in that era.