Mike,

Howdy neighbor. Welcome and congratulations on a very nice find.

I'm not a frequent poster here because there is so much information in the archives that many of my questions have been already answered. But I couldn't resist a fellow Seattleite.

For example an advanced search in the General truck talk archives for +tubeless +tires and newer than 5 years yields 108 results. The opinions vary on tubes vs. tubeless and radial vs. bias ply but there certainly is a lot of info.

Enjoy.