Hi,
I sorry but i would'nt know where your grandfather was burried. But i wonder if he could have a connection to my family. My grandfather came from croatia between 1955 - 1965 to Australia and he may have had brothers. he also fought in world war 2. So he probably was old enough to have a brother fitting your grandfathers description. If you get in contact with me i can find out whether he had a brother who moved to America. I don't want to get your hopes up, he may not remember whether his brother stayed or left croatia.