Mystery Part

[befland]

I am trying to find out where this vac tube goes. The clip looks like it should mount to the intake but I can't figure out where it goes. It's not the vacuum tube for the exhaust manifold butterfly valve (this one is about twice the diameter). I was wondering if it might be a piece for the old vac operated cruise control?

http://www.thedieselpageforums.com/photopost/data/500/LowRes9687.jpg

http://www.thedieselpageforums.com/photopost/data/500/LowRes9686.jpg

Thanks, Bill