Correct, NO turbos allowed even pre 1965. A turbo puts the car in the Unlimited class. I gave Tom Bruch an idea that helped him last year bump the record from 106 to 126 in that class. If this engine will hold together and does ok a turbo will go on it and run again later, but for now I am sticking vintage supercharged and need about 20 lbs of boost to hit my goal.