RaceKrafters Machine is planning on marketing a tool to easily measure the rocker arm's travel over the stem of the valve. Pricing has not yet been determined at press time. It will consist of a dial indicator with a mounting bracket made from a valve retainer. The travel of the rocker arm from a closed valve position to one-half maximum valve lift should be less than 0.050 inch. If this tool is not used, you need to securely hold the dial indicator on the tip of the rocker arm.