Air will move both ways with a fan, kind of similar to a boat prop. It might not be as efficient the wrong direction, but it will move it and the wrong way is not good.
OP, where is your water temp gauge getting the temp reading from? You might be getting hot spots around the heads if coolant isn't flowing well enough. Unless your engine is built real crazy, a good radiator, t-stat, water pump, fan and shroud should be able to cool it. If your carb is running too lean it could lead to the extra heat as well. Spark plugs could be the wrong heat range, too much timing, etc. A mild built engine should not have these overheating issues so it sounds like something is wrong with the combination. Has anyone else checked the car for you?
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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