I HAVE RECENTLY PURCHASED A 1966 SKYLARK 4DR HDTP WITH A 340 /2BBL. IT HAS 57000 MILES. TEMP LIGHT GOES ON WHEN IDLING AFTER A WHILE,OR DRIVING. WILL GO OUT IF YOU REV ENGINE FOR A WHILE. I HAVE REPLACED THERMOSTAT, AND PULLED WATER PUMP TO FIND IT WAS LIKE NEW. RADIATOR LOOKS NEW ALSO. LOOKS LIKE INTAKE GASKET WAS RECENTLY REPLACED. PREVIOUS OWNER MUST HAVE HAD OVERHEAT PROBLEM AND NEVER SOLVED. HOSES LOOK NEW AND I BACK FLUSHED WITH NO HELP. CURIOUS SIDE NOTE, TEMP LIGHT CAME ON WHEN BACKFLUSHING WITH COLD WATER. AM NOW TRYING WITHOUT THERMOSTAT. AN IDEAS???????? THANKS, JOE