Inliners International Forums General Discussion Engines Running lean on #5 cylinder?

THE REASON THE VALVE ARE SUNK IN THE HEAD IS BECAUSE OF RUNNING UNLEADED FUEL IN A HEAD MADE FOR LEADED GAS. TO SOLVE THIS PROBLEM HE NEEDS TO INSTALL HARD VALVE SEATS IN THE EXHAUST VALVE SIDE OF THE HEAD.AS FAR AS SOME LOOK SUNK THE HEAD MIGHT BE JUNK