I might have finally gone completely nuts

For the time and material needed to just build the valley and flanges I think it would be easier to buy a cheap air gap intake and cut the carb base and runners off. Then you can get ideas and parts here, including EFI.

http://ingleseinductionsystems.com/#

Yeah, maybe a little nuts. But, I remember a red '71(?) Road Runner a few years back that had a setup like that on a big block. People loved it. I got a lot of respect for people that aren't afraid to build something other than the same-old-same-old.