No need, I found the issue by looking at the pic of the previous plug change...I am using too much anti-seize and putting it too low on the threads. It is running down when it gets hot and fouling the plugs. If it was a compression or ring issue, it wouldn't be all 8 cylinders, and wouldn't be within the last 30k miles after 140k bone dry miles. The engine still makes a ton of power, no way I would have compression issues on every cylinder.
I never used anti-seize until I started changed plugs in DW's Magnum with the 5.7 hemi. Aluminum heads you have to use anti-seize, so I figured a little on the burb wouldn't hurt even though it's got cast iron heads.
Plugs don't spin out easily either. They come out, but you need to ratchet the whole way. Not near enough force to break anything, but just more than you can apply with your fingers. They spin back in about halfway by hand.
I think I'll plan on changing the plugs again this summer, and put the new ones in without anti-seize.
Thanks to all who posted comments and helped me figure this out!
