I have read all the cooling threads. This a different twist. I get hotter on the freeway than in the city. I have a mild 350 in a 64. Summitt universal alluminum radiator with a 16" electric fan and a full schroud. I did a little experiment. With the car engine off I flipped my fan on (about 2400cfm) and put my hand on the engine side behind the fan and really felt the fan pulling air strong. I then shut the car electric fan off and put a 20" household fan, a Patton brand, in front of the grille and turned it on high. The fan barely stands, it wants to tip over it is blowing so hard. Then I put my hand on the engine side of the radiator and could hardly feel any air comming thru. That fan took the place of being on the freeway I think. Only 2 things are in the way of the air, 1-the billet grille, 2- the 16" fan. Anybody else try this. No wonder I'm hotter on the freeway. No Air Flow. Any ideas?