A GAZ jeep owner contacted me as his head had frost cracks , He sent me pictures and it looked like a standard 3 bolt water pump "B" head it even had the "C" between no.2 and 3 spark plug holes . Looks like the GAZ factory still used the Ford head casting mould . I sold him a regular "B" which bolted right on . He was a happy bunny . As for value whether "A" or "B" head I think would be no different from a regular USA head .
John in no weather today Suffolk County England .