No, it definitely didn't overheat.
The hose broke just as I pulled into a parking lot.
The hose had 165K on it!
I know what a leaking head gasket is like and this isn't like that (I've seen it happen to three cars before.)
Besides, there would probebly be water in the oil (which there isn't) and the engine would overheat.
It is the same regardless how long the car is driven.
I have driven it 70 miles per day for two weeks and it runs fine once it is at a sustained speed. It also idles fine until it is put in gear.

The tiny oil leak was just because I pulled the valve cover gasket off several times before I figured out where TDC was.
It was nicked and kinked.
That's what I get for trusting the Haynes manual completely!

Ask me about the Chilton manual that instructed me to tighten head bolts on a 350 small block Cevy at 103 ft lbs!
The text from the diesel engine was inserted in the gasoline section! I almost followed the instructions!

The miss definitely seems electrical.
In fact, once when the hood was open during a sudden un-expected downpour the miss actually got worse.
I was having to jumpstart the car during a light rain which got heavy before I closed the hood.

I am leaning towards the plugs being the wrong type.

I will try that.
I also need to put in a new fuel filter.

But who knows?

DB