343 head- coolant leak

Hey all- quick question. Getting ready to start a freshly assembled 1969 343 and I have a slow but steady drip from the driver's rear bottom head bolt. Was I supposed to have used sealer on these bolts (like the old Dodge Poly motors)or is there something else going on? nothing in the TSM about sealer. Heading back out to the garage to pull the exhaust manifold because it has to come off regardless...

And if sealer is needed on the bolts, is it all of them or just a select few?

Motor ran well with no leaks prior to being disassembled. Only disassembled it to inspect bearings and install new gaskets. No other internal work done.

Appreciate any responses. Would like to have this running by the weekend.

Same issue I had with my 343, only after rebuild, same area for leak, and it was a cracked head, it cracked at the rear lower bolt, if you look at the casting it is cut at a sharp angle , factory did not allow relief for the stress of the final torque. I read somewhere on this forum that during final torque people have switched the torque sequence to torque the bolt in the rocker area 1st then the lower head bolt, thought is it takes the stress off the lower area.

BTW what sealer do you recommend on these? Since I'm doing them again!