Hi Mike,
Inexpensive handmade hardwood wedges, (oak or maple), always worked for vintage mechanics to remove heads off of "all" vintage heads on "all" types of vintage engines; however:
1. Today, first problem is finding someone today with enough talent to make several wood wedges; and,
2. If handmade wedges or even if wood wedges were sold by Model A parts suppliers, second problem would be finding someone who knew how to drive in wood wedges between the head & block to maintain metal faces of head & block parallel at all times with all head stud holes perfectly aligned with head stud bolts.
Glad you got it off.