To start off with, if you suspect a blown headgasket, when you pull the heads, send them out for a valve job and have them mag fluxed to make sure they are not cracked, if ok, then you can go ahead with new gaskets. Also before pulling heads, you want to do a compression test on each cylinder, Just curious, why do you suspect a blown head gasket?
All the signs of a blown head gasket. Eating antifreeze, oil the color of chocolate milk, using oil. Moist exhaust.