47-55.1 vapor lock issues

[dsraven]

yup, like geezer says, get it ALL right. check the condition of the tune, valve lashes etc, all that. a lean mixture will run hot.
check exhaust system for signs of back pressure, loose baffle inside the muffler etc
look at the cooling system, including thermostat, hoses, fan and shroud etc. even the coolant. check the strength because some guys will run just water thinking they are saving a couple buck but coolant is not just antifreeze, it is an anti corrosion, lubricant for the water pump and also raises the boiling point. check out front to ensure the rad can actually pass air through it. also check inside the rad looking for a blossoming at the ends of the coolant tubes. this would indicate some build up in the tubes which reduces capacity to cool significantly and would suggest that the inside of the engine is the same. a bit of rust or corrosion build up goes a long way in allowing the engine to cool properly.