I’m sure this discussion is on here somewhere already but I couldn’t find it after searching a while. Sorry if this is a duplication. ‘72 304 Installed my heads following TSM and Haynes directions. Neither mentioned anything about putting sealant on any of the headbolts. I’ve come across some blogs that are saying there was in fact one bolt on the driver’s side that is not blind and should have gotten some sealant to prevent coolant climbing the threads. Anyone know if this is true, which bolt it actually is, and at this point is it worth taking that head off again, putting sealant, and re-torquing the whole thing? I would rather not at this point but if it is mission-critical obviously I will.