Just for my own information and clarification, on a 2003 7.3 just WHERE is the HPOP located (this is in my E550) I seem to gather from other posts about that its "easily" accessable, Dealer says its INSIDE the engine and a major expense in labor to change it. If it is indeed located outside the engine, and needs to be replaced, how hard/easy is this to do. I have basic skills and tools although I don't really enjoy mechanic work anymore I would rather do it myself if possible than pay the dealer 1200.00 in labor. I also gather that these are rather spendy little items so if theres someplace out there in Powerstroke Land that sells them reasonably priced..I'm all ears. Thanks.