Hello. Welcome to Just Answer. Please allow me to assist you. Yes, the head gaskets could be reversed. The question I have for you is how are you determining that the engine is overheating? Via the temp gauge or via a means of measuring the actual coolant
It is possible that you have a head gasket issue...not reversed, but deterioration of the gasket is allowing pressure to enter the cooling jacket. The compression pressure will over-ride the water pump
and cause the coolant to slow down. There is a tool that uses compressed shop air to determine head gasket seepage into the cooling jacket. The tool screws into the spark plug
hole. Manually crank the engine to close the intake and exhaust
valves and apply the air to the cylinder. If the radiator has bubbles in the coolant, the head gasket is seeping and needs to be replaced.
It would be prudent o know that when the engine overheats, is the radiator the same temperature all the way down from the top, and from side to side. If there is ANY temperature difference (hot top, cold bottom), replace the radiator.
Finally, bone white plugs indicate a too lean condition. You may want to rethink the jet sizes on the 4 bbl carb if this is possible on that particular carb. If you are using a 'hot' coil and plugs, you can expect the plugs to be reasonably white.
If you have any questions, please feel free to reply.
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