I can't speak for the heads but the 22re performance 282 cam Jim sent me is pretty awesome. 17-20 mpg and the truck actually gets out of it's own way.
The valve springs he sends are 75 lb, I don't think that's too crazy. I'm pretty sure the 272 cam can be used with stock valve springs, but with carb you can push the cam profile a bit more anyway.
An adjustable cam gear is pretty fun to play with too, even with a stock cam.
Also don't underestimate a careful gasket match and mild port matching/polishing. On my last 20r head I just gasket matched and then blended in from there and equalized the sizes of the ports to match the largest port after polishing a bit. Nothing drastic mind you, don't get carried away, but the engine feels great, so I think it helped a bit and I definitaly didn't screw it up.
Not saying you shouldn't buy a nice head, but a guy like you could certainly put a head together. Heck I used a tool you made me to put the new valve guides in