Thank you Scott iv , Extech, and Fred Heath! I am bringing her into the shop today to get a new cap and rotor put on and I will ask about the timing (though I imagine that was set when he replaced the timing chain and guides) and also about checking for excessive exhaust back pressure. I may also take it for a spin up the grade and see what happens with more of a challenge. 

Again, thanks so much for taking the time to share your thoughts here. I really appreciate it. 

Couple additional considerations: condition of the fan shroud, and ensuring air is out of your cooling system (burping). 

I installed a 4 row aftermarket aluminum radiator that does not have the ports for transmission cooling. I added a separate transmission cooler. The aluminum radiator is thicker than the stock metal and holds more coolant. The trade off is the thing is delicate and you have to be very careful when working near it or you are flattening fins. My main problems with overheating were a bad clutch on my fan, and exhaust leaking into the motor from a bad head gasket (coolant eventually as well). I feel my decision to replace the radiator was not necessary as many folks here use the stock metal one without over heating issues. 

Sounds like you had a lot of work done. Kits for checking if exhaust is getting into your cooling system are cheap and easy to test. Perhaps head bolts were not torqued sufficiently. Electric fan system may need to be evaluated further also.