Easily modify your heads for 1/6 ratio rockers with this handy pushrod slotting tool. Simply use a 5/16 drill bit to correctly lengthen the pushrod slot with precision. Recommended usage is one tool for each set of heads. Product Features:Modifies Small Block Chevy Cylinder Heads for 1.6 Ratio Rocker ArmsDesigned to Elongate The Pushrod Slot in The Cylinder HeadUses a Drill and a 5/16-in. Drill Bit (not included) To Elongate Pushrod Slots
