Wow, that chart is great. Thank you.

In my case, 62MPH would be 3,000RPM. I am going to do some more driving and see how it goes. The motor is healthy with good compression on all cylinders, the valves are set. I get a little smoke on startup but I guess that is to be expected for the age. The car sat for 20+ years and the fact that I have now done a 40 mile round trip feels good.