Ian Raby continued to enter the now BRM-engined BT3 in occasional races through the and 1965 Formula One seasons, although without scoring any Championship points. He had provisionally entered the car for the 1965 Italian Grand Prix, but following his failure to qualify for the preceding 1965 German Grand Prix, Raby sold BT3 to future British Hill Climb Champion David Hepworth. Hepworth used the BT3 chassis, now carrying a much larger Chevrolet engine, for a number of hillclimb events in 1966.