Since you are using the 7 blade fan, you need to be sure the clutch unit is engaging at idle. I'd be willing to bet the fan does not spin very fast even with the engine reved up. The STOCK replacement type clutch unit will not spin the 7 blade fan fast enough as the fan is to heavy. You need the HEAVY DUTY clutch unit. My Challenger did the same as you describe until I replaced the fan clutch and now it sits at 195* or just slightly above in traffic with a 195* thermostat. Also sounds as though you need a heat insuator or spacer under the carb

Last edited by Mopar73340; 05/30/08 04:10 PM.