When I rebuilt my Ford 200 I6. 2 of the head bolts go into oil galleys. the Motors manual I had said to use RTV sealent on those 2 bolts... to even everything up, I used RTV sealent on all the bolts...
Also, when I had to remove the gas filler neck from my Falcon to weld in a return connection, the gasket got destroyed.. I ran a bead of RTV, let it dry, then bolted it all up. sealed perfectly.