At this point the poster does not want to spend a lot more time on the issue I believe.

If the original driver tried to restart the engine and it would not turn over it was most likely seized up and some damage occured. On the otherhand if the engine would roll over freely with the starter with no cool down period right after the quitting. The engine probably did not tighen up. Most people in my mind would try an almost instant restart.

There is also a chance the original owner left something out in his description of events that may have been important. It was reported the engine would not restart at the time of the event. How it would not restart seems not to have been mentioned.

What has been irritating me is I cannot decide what should or should not be coming out of the tailpipe in the current senario. Or if running the car at it's current maximum rpms for half an hour would be a good indicator of bearing friction.

The cooling system should not handle that much indicated engine loading without going too high I would expect is another test. If coolant temperature stayed normal I would have to almost assume it is not a loading issue.

Another question I asked long ago was if the throttle arm advance was linear or did the engine reach it's maximum rpm well before the end of the linkage was reached. Or just progressivly picked up rpm over its total arc.

Since there is no probability this engine is going to be rebuilt I probably would do the half hour to one hour test watching the coolant temperature gauge carefully. These cooling systems have no great reserve capacity usually. There are still perhaps a couple of variables or judgement calls required on the results though.

No heating combined with the owner statingthe engine did turn over well right away after the initial quitting I might consider jamming the mechanical timer in a well advanced position. If the engine would start that way you would want to pick up the rpms fast though as it would be far advanced at idle rpms.