My 72 240 with an L28 has a problem with overheating. When I bought it the radiator was cracked, so I had it re-cored. I re-installed it on friday. It doesnt overheat quite as badly, but operating temp seems to be around 230 degrees. I'm worried about warping my aluminum head! How can I keep it cooler? **** this car has proved more frustrating than I had anticipated...thanks guys