having a cooling issue I need some advise on....? My duster is running hot...last fall I blew an alternator and fried the belt...being a few miles from home i decided to chance makin it to the garage...the car did get hot(in the 220 range) but as it did i shut the car down and let it cool....anyway after replacing the alternator i decided to throw in a new water pump while i was at it....took the car out ...and it ran well ..but seemed to creep up into the 195 range( 180 stat).so...i put in a 165 thermostat foolishly thinking i would compensate...the car runs great but still creeps up into the 195-210 range...I checked the fan clutch and I do run a shroud..Is it possible i popped a head gasket????I dont see any smoke...and it is not using /losing coolant...any ideas on where to start here?the car always liked to run on the warm side and although it does not overheat not maintaining a stable temp does have me a little concerned....comments????