Does anyone think it is the radiator besides me?

thanks all. The car doesn't have a shroud around the radiator. I haven't seen one on the darts. New fuel filter,fuel pump, new bottom hose. The engine has just recently been re-built and runs fine. I will pull the plugs and see what that tells me. The running hot at higher speeds is perplexing to say the least.

Thanks to all that answered.

Bill