It's funny how many of these old manifolds show up especially when you figure how low the production must have been. I also wonder sometimes how many were bought installed and then taken back off and put on a shelf when someone couldn't get them sorted out.

I had a lot of fun putting my Drag Star setup together especially building the linkage. Eelco makes some nice linkage packages but I'm cheap so I built my own. The really fun part was figuring out the choke linkage for the center 2 carbs (wasn't hard to build but finding a place to run it without interference was a bit of a trick).

That X-! is an interesting intake. If I came across one I think I would have to try to build an engine around it. Good luck in your search.