cly base seal
 

rebuilding my 91, 3.6. with upgrades ARP rod bolts, new MAHEL P&C, (24) 993 head stud's. case sealed as per Henry's method. my question is about the cyl base green O-rings. what's the best way. Threebond 1211 or Dow Corning 111.
I have both on hand. Thanks Jerry

With new o-rings and new cylinders there should be no trouble with simply using an o-ring lubricant.
If there are signes of wear or cylinder movement around the case spigots use 1211.

Thank you Henry, I respect your knowledge. Dow 111 it will be.