Well, here are my final thoughts on the subject.
It's only a snapshot in time, but Cobra Country has five (5) Kirkhams either for sale or sold. Three (3) of them have aluminum 427 FE blocks and two (2) have original cast iron 427 FE blocks. None have 428's.
I assume that there aren't too many 428's installed in Kirkhams and none that come quickly to mind.
Sooooo, get a 427, new or old, cast iron or aluminum.
