Labor time is 16 hours. Ford manual recomends removing engine. Too remove the engine the Intake has to be removed and for heads to be removed valve covers have to be removed as well as front cover. There should be no additional labor charges for those leaks. Removing the cab or removing the engine is about the same time. There is no way I would put a reman engine in it. Just fix the head gasket. 2500 sounds about right for a dealer. This is not a hard repair. Sometimes the leak never really gets any worse so maybe waitr and see? My wifes 2003 Expedition has over 300k miles with no problems. They are good engines.