Coolant leak from head bolt?

Update... I resealed the exhaust manifold stud with RTV (which has worked for me in past, unless there's an issue with fitment), torqued it, let it sit a day and a half and... that did not stop the leak.
Checked the torque on the first two lower head bolts on that corner and they are tight and do not show any residue from a leak at the head. Where I am seeing the coolant pooling is on that little flat lip/ledge that sticks out on the driver's side front corner of the block, just below the head. So at this point I am thinking it must be either:
(a) the x-stud is still leaking (I believe that hole has a heli-coil inserted so that could account for it)
(b) the head gasket is leaking (there is a water passage near that front corner, at least my bare 340 block has one there so I assume the 318 does also), even though it has less than 10,000 miles on it (standard fel pro gasket, 273 closed chamber head).
Not crazy about pulling a head until I know I need to, and there are no other signs of blown headgasket. So I'm debating whether to just live with the slow leak for now? I'm all ears if anyone has any ideas I'm not seeing... thanks!
Bill