Ok, here's what's going on. Never had an overheating problem. I installed a Roe supercharger. Installed headers, had cylinder heads ported also. Changed thermostat to a 180 degree stat. and had stock radiator recored to a three core. Car started and ran fine for 2 weeks, didn't overheat at all. All of a sudden one day I look at the temp gauge and it reads around 230 and is climbing. I stab the gas hard and the temp gauge quickly returns to normal. In the next few days this happens a few times but always cools off after I get on it. Then it overheats again & won't go down even after getting on it. I pull over & coolant boils out overflow. I let it cool and drive home stopping several times to let it cool off before it boils over again. I replace the water pump figuring it's 16 years old and must have went bad. Car overheats before I can get it out of the garage. Now I'm thinking I must have gotten a bad thermostat. Off comes the supercharger and in goes another new NAPA superstat PN 613080 180 degree thermostat. Car ran all day long without overheating. After sitting for 4 hours I went for another ride and it overheated again but cooled off quickly after I got on it. Anybody ever experience anything like this before? Anybody got any ideas ?? Bo don't know.