I have a '39 Ford with a 355SBC, Mustang radiator, flex fan, and an auxilary electric fan with an adjustable thermostat. When running a 180 stat, it ran about 160 going down the road. I changed to a 195 and it did fine (190) until I parked it and let it idle. It got to about 210 which didn't bother me a lot but when I shut it off it went to 230. I turned on the electric fan and it cooled down pretty quick. I don't have a shroud but have an aluminum one I plan to install. I'm running a tunnel ram with two AFBs so right now I'm not running a hood top panel(it's a standard model). I really don't want to wire the fan so it runs when the engine is off. I have an overflow tank but it is not at the top of the rediator. I'll change that too. Any ideas? Thanks in advance, Rod