just spent 5000 on new oil cooler and headgaskets in south florida. saw oil dripping, was coming through the radiator resevoir. had them go ahead and replace head gaskets too. all stock truck. 2006 f350 King Ranch 4x4 dually. ran good coming home to alabama from south florida for the first 350 miles. started struggling climbing hills and felt like starving for fuel. problem didnt exhist prior to tear down last week. no codes flashing. un hooked trailer, still there. feels like it shifts funny too. any ideas? called ford dealer that did the repair and notified them during the trip also. please help. runnin out of money!