Update: Been rough going here with this car. After my initial burst of enthusiasm, reality and my real recent back surgery put this repair on the good days only schedule. The engine is presently out, heads off, on my bench.
The amount of cleaning and the JB Weld removal equals a new winner in the nastiest engine I ever pulled contest. It is absolutely a testament to these engines that something in this state of repair was pulling just at 29mpg when I started this project. The valve covers were literally poo-pooed ( JB Weld) to the cam carriers which was poo-pooed to the heads. I actually had to chisel the poo-poo blobs from the bottom exterior cam carrier bolts so I could remove them.
The good news is JB Weld responds to the dremel well enough.
Today I'll be finishing up with the JB Weld removal, clean up and parts inspection. At first glance I'm not seeing a whole lot of work for the machine shop, so maybe there won't be any delay on that front.