So, I had an idea.
428, runs great, little hot in hot weather, and I live in Arizona. People here have been tremendously helpfull, but despite the aluminum radiator, electric fans, trans intercooler, she still runs a little hot. 190ish in hot weather. So, my original fan is only running with the like 8 inch metal plate that says "CAUTION - FAN", ya know the original metal 1965 "shroud" . I use that as a guide for how my hood shuts. That is top clearance. Pic attached.
Now, I had a plastic shroud. I still have parts of it. I could never get it mounted right. Several times it got mauled by my fan. I have the bottom half of it though. It's pretty beaten up, it fits. A new one is like $85 ... I know, but I am cheap. Maybe the bottom half ... better than nothing at all?
http://m.imgur.com/zh8DeYwMaybe, I can create a flexible, adjustable shroud, or a shroud made of multiple pieces, so you can remove or adjust the shroud without taking the fan assembly off. Patent it, get rich.