[67FEfastback]

Thanks for your suggestion, Bill.
All of you responses have helped me get this close to a conclusion.

I filled the balance of coolant up with distilled filtered water. That should get me to around 50/50.

I left the rad cap open and ran the engine up.
Slightly over 1/2 on th temp guage, no flow.
Ran it a bit more. Shut it off.

I figure the thermostat was not even opening.
When I restarted I did get coolant flow, until the temp went down a little, then it stopped again.

Even at 3/4 mark on the gauge there is not too much flow.

So it is not likely that hot.

The only thing I'll need to do is to be wary of the stop and go traffic scenario,
It was obviously heating up, more than it was able to cool down.

I think I'll still look at a larger rad and possible pusher fan, for the summer time heat. It's better that I have too much cooling capacity, than not enough and struggle in the summer.

What do you guys think about size and combinations of pusher fans?