Thanks for the advice. I will do the copy paper test this evening. The radiator is original 26" with all seals in place. Including radiator to shroud seal. Does have the shroud so air flow should be as designed. Was restored all original (and radiator recored) about 6 years ago but only has about 300 miles since resto. I don't know if the hoses has springs in them but they do not collapse as I have inspected them at idle after reaching 230 degree gauge temp. At idle, I put the heat sensor gun after running to gauge temp of 230 and this is what I have...top hose reading 213, bottom hose reading 210, sensor reading on engine 220. I do not know much about mechanics but my "red flag" about the problem is that when I can reach 45 mph and stay at that speed or greater, I cool back down to about 195-200 degrees. Thanks and I will let you know what happens with the copy paper test.