it should not run that hot.  i would be checking timing and check for excessive exhaust back pressure  

Thank you for the feedback!

I had the stock heat gage replaced with an analogue one. The day I picked it up and drove it home, the temperature on a 75 degree sunny afternoon going 60 mph on a flat section of interstate was about 240/50 as I recall. My mechanic said I should pull over and let it cool down if it got to 280. It never did. I have yet to take it up the grade south of town to see how it does with a hill. 

I replaced the fan clutch last year with an electric cooling fan. 

I am more concerned about damaging the engine again through it chronically running too hot than about resale value. I think it could be possible to create an aesthetic air scoop/ bump in the hood to accommodate a larger radiator which might even increase its appeal. But that’s just like, my opinion - to quote Jeff Lebowski. 

Thanks again for your thoughts and wisdom. You people amaze me. 

That is the first time I've seen the exact floor plan as my SunRader.