So the clamp referred to above (65chevyc10) is the bracket that is held by the 1 screw shown. And do I understand that the adjustment is accomplished by twisting so the hole moves up the channel? Thanks for pictures Lugnutz.
~ HB 1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery 1962 Chevrolet C10 1962 Suburban