can it be my heads?

[mclairmo]

Plugs are wet and black because carb is too rich. If head gasket was leaking, it would likely overheat, not just run at 210 degrees, which is arguably a 'normal' temp. Or, it would blow white smoke out the tailpipe or blow water out the radiator or you would see oil mixed in with your coolant or water on the oil dipstick. I would keep tweaking the cooling system as I mentioned above instead of pulling the heads. One fan may not keep it cool if the fan does not pull enough air through the radiator or if there is no shroud, or if the water pump pulley is too big, etc. There are many reasons why you could still run hot with even two fans. Are you sure the fans are running at 100%? Proper size wiring and proper use of relays are needed to feed those high amp fans. You may also need a higher amp alternator to feed two fans. I am also not convinced that you are truly runnning abnormally hot. I also don't like your compression numbers. There is a huge varation from high to low. That indicates a possible problem to me, maybe ring gaps are not proper, some cylinders are worn, burnt valves, etc.