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You should definitely run a fan shroud and a 6-7 blade clutch fan. Overheating a low speeds is all about airflow through the radiator. A high-flow water pump is not necessarily the answer, since it is possible to circulate the coolant through the radiator too quickly and not allow enough time for heat transfer.
Having said that, 210 deg is not really a problem. Keep in mind that with a 15 psi radiator cap, water boils at about 250 deg F. That's the whole point of a pressurized system. Also keep in mind that temp gauges are not necessarily all that accurate.
The fact that you have a 180 deg thermostat (for example) doesn't mean that the engine won't go above 180.
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Joe Padavano
64 Jetstar 88 Conv
66 442 L-69 Conv
68 W-30
69 H/O
69 442
70 W-30
72 442
84 Custom Cruiser
86 Caprice wagon (w/307 Olds)
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