I have a '69 351W also, I still have the stock radiator, just flushed and boiled out. Stock water pump, too. I do have a Flex-a-lite 17" flex fan. It adds a lot of looks and is better than the stock one. I also have a 160 degree thermostat. It runs fairly hot, but not anything excessive or remotely dangerous. Hope this can help a little.
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'69 Coupe with 351W
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Edelbrock Performer-RPM intake manifold, Edelbrock Performer-RPM cam, Edelbrock lifters, Edelbrock 750 cfm carb, Accel coil, Moroso Blue-Max spark plug wires, Hedman headers, 2 1/2" pipe, glasspacks, Edelbrock double roller timing chain, Edelbrock valve springs, Flex fan, C4, Lakewood traction bars, 3:1 open rear-9" 3.89:1 posi coming this summer
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