OK, count me in for at least one set of heads. More, if I can make them work successfully on stroked rover blocks. I'll have to come up with a custom manifold, and have a cam cut, of course.
As for my 2 cents on design issues, a modern, heart shaped, quench type, combustion chamber would be very nice, as would valves lined up more on the center of the bore. Should probably flow, out of the box, as well as well ported iron heads, with plenty of material left to hog.
A taller valve cover flange/mount/skirt, so stock covers can be used with most rockers. And, extra cast in bosses that can be drilled so I can use my beautiful Offy 215 valve covers (if not, there is always the tig).
I don't care whether the valve train is buick or chevy or whatever, as long it is fairly common, light, and can handle high lift and high rpm.