I may look into those too. I've been looking for old double humps too but all the ones I'm finding around here are trashed and want a ton of money for them.
Double humps are expensive because A) they are the best "racing" head for classes that require OEM heads but don't allow Vortecs. B) some people still think they are "good" heads.
Don't feel bad that you can't find any, or that they are pricey. As mentioned, to get used heads up to new head specs requires a bunch of money, especially if you consider pulling the press in studs and replacing with screw in, which almost all aftermarkets come with.
You'd be MUCH better off waiting until you can spend somewhere around $1000. In the "mightaswell" category, once you get to around $1200, pretty much any head that you'd want to run on a street truck is within your grasp. AFR, Brodix, etc. And that keeps you from having to take a gamble on the Chinese ones.
From back when I was looking, the Edelbrocks were not the "best" head out there, but they are on the lower end of the good head price scale, so I mentioned them. Also, they offered a fair number of different combinations (Vortec pattern, higher lift springs, etc) of complete heads. Your intake (bolt pattern) gives you the most options available for heads, but you'll just have to determine where your price limit is. I don't think I'd ever skimp on heads. Good heads "make" a lot of power. By being smart and bumping up compression and not going crazy on flow (depending on desired RPM range of course) you should have no problem finding a head that works well for exactly what you want.
I know there are other retailers out there, but I really like Summit's web page for ease of being able to select a variety of options to narrow your choices way down. For instance, I can't think of a reason I wouldn't go with a 64CC chamber on a cast iron head for a 350 that I wanted to run on 87 octane.
