[Hib Halverson]

No "MacGyver Engineering"?

Nah.

All you need is the following tools:

⅜-drive, ⅝-in plug socket with integral u-joint
one-inch extension
⅜-drive u-joint
long ⅜-drive extension.

Put all those together and you can easily remove plugs from #6 and #8 cylinders.

When I needed to change plugs, I used that tool stack for the entire 20 years I owned Barney.