How to Lap Valves on GT40 Iron Heads using a hand drill. This process can EASILY and SAFELY be accomplished with the aid of a drill. I include my process with helpful tips!
Products Used:
Permatex Grinding Compound (1.5oz): https://amzn.to/2TrnG3g
Valve Lapping Tool: https://amzn.to/2VMdG6n (fits most, but measure your valves to make certain)