This blue smoke "shows up" under what circumstances? How much smoke are we talking about here; a puff on takeoff or a James Bond accessory? Has this truck been sitting for the past decade or has it just started doing this after years of use/abuse?

Common "blue smoke" culprits are valve stem seals and rings. If that's where the problem lies, nothing you do to the plugs is going to help much.


1955 First Series GMC 250 1-Ton Panel
In the Gallery
Mr. Hedgehog - Follow the build
If you can't laugh at yourself, I'll laugh at you.