A couple of years ago I changed the plugs in my 2005 Rumble Bee's 5.7, what a PITA. I also have an '82 Dodge Rampage so I parked the Bee in front of the tailgate of the Rampage, allowing me to stand on the tailgate while changing plugs. I used a thick pool floating pad to lay on while leaning over the engine, which helped a little. I bought the truck about a year before, and when I pulled the first plug I was sure the plugs have never been changed, about 110,000 miles. I was having to use a breaker bar to loosen many of the plugs, and was going well until the very last rear plug on the driver's side...it snapped off. The porcelain and the upper metal hex section came out, leaving the threaded section (and a hole into the combustion chamber) in the head. I was able to get an easy-out into it (after removing the valve cover), but no room to apply any kind of leverage to allow the easy-out to grip as that section of the head is in a tunnel. After several days of trying I decided the only way it was coming out of there, aside from paying someone else to do it, was to pull off the head. The easy-out worked perfect once the head was off.
Moral of the story: don't wait for 100k, at least check them around 50k, and use anti-seize!!!
