I think that a good compromise between Edels, and 428CJ iron heads are the C1/C4 heads. With CJ size valves put in them along with hardened seats, and maybe some minor porting and polishing that you would pretty much have at least the equivalent if not better than a 428 CJ head (in terms of flow and cost). They also have a little bit smaller combustion chamber than CJ heads so you wouldn't have to mill them as much depending on your application. The C3 heads would be good to but have a little smaller kidney-bean shaped chamber that is like 67cc and they cost a little more because of that. The C1/C4 heads have the bigger D-shaped chamber that is supposed to be a little smaller than the CJ chambers (I think they average from 72cc to 76cc). Just my .02 cents though.

JC