I am at my wits end on this one guys. Maybe being a mechanic for years has given me tunnel vision on this problem, so here goes. My currebt car is a 1948 Olds 98 convertible with a 45 olds engine, 400 TH trans. I am using a Griffen cross flow radiator, 2 rows of 1 1/4 tubes. I have a fan shroud on the car. Originally I used the fan clutch that came on the engine, but have switched to a fan found on Ford pickups in the late 70's to early 80's. I can't get this engine to run cool, I overhauled it when I built the car, I now have 13,000 miles on the car. We took the car about 40 miles to attend a rodders funeral today, and was stuck for about 15 minutes for construction work. The temp starter creeping up to around 225, reved up the ehgine and dropped the tremp some. As soon as we started moving again, the temp tropped to around 210-212 which I can live with. Keep in mind todays temp was 102. I have been fighting this problem from day one. Any ideas???????????