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I agree about needing 180 degree thermostat. And gosh, put another quart of oil in.
To answer your specific question, those oil pressure readings don't seem bad, though they're maybe not optimum. Within the range of acceptable, but that's kind of a loosely defined range. As I understand it, oil pressure is secondary to how well - and thoroughly - the engine is being lubricated.
Some higher readings can be caused by blockage in oil passages, which is far worse than low readings. Also, some early Y blocks had lubrication problems with the rocker arm shafts. Taking off the valve covers and seeing how well that part of the engine is doing is probably a good idea.
My '54 Ford with the non-rebuilt 239 has what I consider decent oil pressure for a 65 year old engine, and it reads (as I recall) just under 50 at start up idle, about 18-25 at hot idle depending on amb. temp., and I think about 35-38 at hot highway speed (2500 to 3000 rpm.)