Leaking Head Studs

[91A-77B]

I recently had my 59A completely rebuilt. Block was baked, magnafluxed, etc. When I first fired it up, several of the head studs were dripping coolant. After running, I re-torqued the heads (vintage Navarros with dead-flat decks) 3 times @ 45#. I now have 3 that keep on dripping after about a total of one hour running. Questions: is this normal? Should I keep running it and hope they'll somehow seal themselves up? Should I pull the studs and re-seal? Any other ideas? Thanks for your help.