Thanks? There's a button for that. (I'm shameless)
I was actually trying to find another plan that Mechanix Illustrated published back in the day. It was similar, except it was built on a back bone frame that articulated in roll just ahead of the drivetrain. It would lock for highway driving and then unlocked it had massive wheel travel that would follow the terrain even though it was only 2WD. I settled when I came across the Boonie Bug.
What year is that Westy? Clear title? Need a lawn mower?