Source www.laurent-roy.com : blog auto: 1969 Rupp Super Sno-Sport:

Dual tracks, with a Hillborn Fuel injected 308 Ford with Gurney Eagle heads. It puts out 525h.p at 7500rpm. Built by Jim Head and driven by Mickey Rupp himself - this is 1 of 1 Produced.

The world’s first snowmobile dragster was the Rupp Super Sno-Sport, a 525 horsepower (at 7500rpm), 308 cubic inch racing research racing. Its top speed was estimaed at 150 mph and braking is by disk brakes on the drive axle coupled with a cable-release parachute. It was conceived by H.E. (Mick) Rupp, 32 year old president of the Ohio company, who havs successfully raced at the Indy 500, Sprint and karting tracks all over the USA. The Super Sno-Sport weights 1,000 pounds and was valued in excess of $50.000.