Sean;
I believe Chrysler does have Max Wedge heads available. The second and third hand information I was told ( so take it only as such) was that Mark Wilson tried to use a set of these "new" heads and had some issues with them, so he ended up having to patch up an old set of original castings and got tossed at the Gators in 2000 or 01 because he had replaced more than 2 valve seats on one of them. I'm sure Mark could set the record straight on this.
This isn't ment to slam Mark in any way. I have known Mark for over 20 years and he is a great guy, even though he is an old Mopar racer.