I've ran out of ideas. Now I'm asking for help. I have a freshly rebuilt 454 with stock bore. I cant get it to stop overheating. Its running at like 240. I've retarded the timing, put a new aluminum radiaitor in, new water pump. no thermostat just a restrictor plate. several different electric fans, I even put a flex fan on. I tried a different guage and it reads the same. Its in a cj5, I have a one pice front end and it still runs hot with the front end off. This is my last hope. I'm going to take the heads back off and insure that I didnt screw up putting the head gaskets on. Any ideas would be greatly appreciated.