Most thermostats rated at 180  160 195 only start to open at that temp. They are not fully operational until they climb somewhere around 10 degrees higher. So a 195 isn't fully opened until you reach 205.. Also remember that for every extra pound on your cap will usually add 3 more degrees to your boiling point. My family has been in the Radiator Repair Business for close to 75 years.would be happy to look your rad over and give you some advise make sure your problem is not in the core. We work on classic stuff from all the country. Would be happy to help you rule out the most probable part,. You can send me a personal message 406-698-0489 not trying to hustle you just want to help eliminate one part of the puzzle  this forum has been very good to me sometimes you need to pay it forward,  Dave

What a wonderful offer, Dave

Thank you Dave, it's very nice to know you guys have my back like that.

So far though my heating problem seems to be under control. I've since forced the heat-riser permanently open and the car seems to sit right where it should be at 180-185. Though it's also been cooler since last time it over-heated and probably wont be warm again like that till summer comes back around.

If my heating problem comes back I'll definitely give you a PM. Thanks again for the offer brother.