I think a basic head designed pretty much after the existing 235 head would appeal the most. The buyer could reuse the intake and exhaust manifolds, valve cover and hopefully even valves, springs, rocker assemblies and valve cover.
It would be nice to redesign it for more, but then you add additional costs of buying other parts ect... to complete it.
With an aluminum head one could run a little higher compression?? Maybe make them at 8.5 to 1?

John