I pulled my Super6 setup from a wrecked van, 100% complete with the steel manifold as well. Guy wanted $300, or $275 if I would take the whole van so he could get it out of the yard :)
So when you say you can find this stuff at a junkyard, do you mean someplace like LKQ or Martin's where you can pull your own stuff, or are there flat-out JUNK YARDS out there? (I told you I'm new to this, ha!)
I'm not sure how well I'd do at that - I wouldn't know which vehicles to look in, or if I'd know it if I saw it. Time to do some more research! Looks like post-1977? Are the carbs usually Carter BBDs?
I'm afraid I might get myself into a cycle of finding the wrong parts and then having to find more to make them work. I may have to ease into the junkyard salvaging after I understand more about what I'm looking at.