I have a 05 4.0 4wd that I need to do a head gaskets on. I just wanted to know if there are any unexpected quirks to this job before I disable my vehicle in the shop? Like are the head bolts an obscure socket like Triple square? I saw on all data that the axles need to be removed so I can drop the oil pan. Does the oil pan really have to be removed to get the timing cover off?