The Hellcat isn't too bad on plugs if you have the right tools for it. I did a plug job on my 6.4, so very similar. It just takes a socket wrench with a couple of ball joint extensions to get at the rears.I changed the WP on my 5.7 Ram in December (NW Ohio) and that was pain but not as bad as spark plugs I can only imagine the 6.2 is way worse. Good luck and let us know how it goes. I'm curious because I do my own work most of the time.