Best tip I can give is to pay someone to change the plugs on the HEMI. Flat rate for mechanics to do a plug swap at the dealer is 2-2.5 hours( is actually 2.0 but some dealers charge the extra .5 because it is so hard and time consuming )! That should tell you what a "ROYAL PAIN IN THE BUTT!" it is.:booty: :banghead::help:
I love wrenching as much as the next guy but the plug swap on the HEMI is a real nightmare. Especially the drivers side rear 2 cylinders because of the brake booster. There is barely enough space there to even get the plugs in and out of the holes let alone the socket and such.
I have done some god awful hard plug swaps but I personally have no interest in trying to do it on my truck. When you figure it is 16 plugs to boot it just makes it worse. Dodge should have put Platinum or Iridium plugs in for 100K service. Copper core 30K plugs was DUMB! :crazy: You almost have to crawl into the engine compartment to do it as well on some of the plugs. I will GLADLY pay the $125-$150 for the dealer to do it. GLADLY!
If you are going to do it yourself, and nothing wrong with that and my hat goes off to you for trying, then the best tip I can give is to be darn sure you don't cross thread one, or over tighten, and strip out the threads. That would set you back some major coin. Because it is so hard to access the plugs in spots on this engine that is a big concern. Take your time and be sure the plug goes in right and again don't over tighten.
Another good tip is to buy some plugs other than copper cores. Those are only good for 20-30K and then need replacing again. I think you will find you won't want to do it a second time. Buy some 100K plugs( Iridium or Platinum )that won't require change so often.
Good luck and have fun

I think you are gonna need a lot of...:drink: