If you go diamond get them pressure checked first as recommended above. These are early use of aluminum in heads and the quality of the casting process and resulting heads was worse that today’s cast aluminum heads. I have also heard that the guide on the Diamond and Batten aluminum W2 go through the water jacket and have been known to leak so watch for that also.
If it were me and I wanted an aluminum head that can make great power I would run the Indy or Large port Commando Mopar head for the casting quality and Offset intake rocker arm port layout.
Choice boils down to your goals and budget.