Just to update, the new (used) ebay engine was installed and runs great. Based on a lot of reading on this and the NICO forums, I also purchased and had the following OEM items installed:
Front and rear main seals
Spark Plugs
Valve cover gaskets and spark plug seals
All of the plenum gaskets
Water Control Valve
PCV valve
Besides solving the head gasket issue, it is soooooo nice to have absolutely no oil leaking on my driveway.
After some serious thinking about it and my wife basically forbidding me to do it, I decided to let a trusted shop do the work. Maybe 20 years ago I would have attempted the job, but a really sharp young kid did the swap and he knew what he as doing and I'm now really glad I let him do it.