Leaking from head bolts

Hey all,

I once again come to you seeking wisdom. The Duster project was ready to be started for camshaft break in. When doing a final prime on the oil pump, I noticed some antifreeze drips under the car. I have tracked the leak to a couple of head bolts on both sides.

This 318 motor came with the car when I bought it and had just been rebuilt. It is a 1972 LA engine. I am assuming they did not use thread sealant on the head bolts. So my questions are...

1) Does anyone know specifically what head bolts access water jackets on the 318 LA?

2) Can I remove the headers and just thread seal one bolt at a time, or do I need to tear it down to the heads to sequence the torquing?

3) Will the head gasket need to be replaced after breaking the original torque and seal on those head bolts?

thanks in advance!