C30 7.4 454 running hot

[REIDicoulous]

I have a 82 c30 Scottsdale camper special with a 454 I have replaced the entire cooling system new radiator, new severe duty water pump, severe duty fan clutch, new hoses, new 180 thermostat. I have pulled the plugs out of the engine and looked inside with a bore scope nothing looks plugged up, checked the timing and carb everything looks good but the engine still runs 210 and Starts creeping up even more running down the road. I have checked to see if the gauge is correct and it's spot on. I am out of things to check. Any ideas?
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