T&D roller rockers This video will demonstrate correct valve adjustment after the correct length pushrod is determined. This works for TA and Champion heads with T&D roller rockers. T&D says start with adjuster level with rocker. This is backed all the way out in my experience. Then I mark the adjuster with a very visible color. Turn one turn down. Use checker to get pushrod length. Once pushrods are in hand install them on one cylinder with cam on base circle...TDC...besure it's the correct TDC