Comp Cams Louis Tool
When switching factory Small Block Chevrolet heads over to 1.6 ratio rockers, the pushrod will rub on the bottom of the pushrod slot in the head. Long-time cylinder head man Louis Cox designed this tool to simplify the required modification in this situation. Tool allows use of hand drill and 5/16" drill bit to elongate the pushrod slot in the precise location and proper size.
Tool is designed to wear so a new one should be purchased for each set of heads