I got all of the studs off. I think you are up to something with the multi metal issue. I have eliminated option of using the spark plug hole threads since with such a tight head/block bond, i will simply strip the threads. Have also eliminated the liquid in the cylinders since the valves do not close completely and the piston cranks and/or babbit cold be destroyed.
I believe the only practical option left is to pry up the passenger side of the head where there is a gap, install wedges and try to force the head to peal off towards the driver side, If that does not work I guess the cars only chance for life is a combination engine/ transmission change out with more modern combination.
Also thank you Peter for the information that the original head was probably iron