I run a 195* t-stat in my '83 GMC plow truck, but it mostly operates in the winter. I installed a t-stat housing temp gauge (mechanical) and found that Autozone sells a cast-iron (China-mfg) t-stat housing that has 'extra' ports on it - perfect for adding a sending unit. This part was super cheap - $12 or something.
I think 210* is ok - but I wouldn't go lot hotter. By running it hot, at least you burn off any condensate in the motor oil, which was my goal on the plow truck.
Colo Springs, CO