How heavy are you? At 82psi, the heavier you are the more you invite pinch flats and/or blowouts from sudden unseating. As you hit a minor obstacle - such as a small pothole or raised concrete joint (sidewalk or road) the tire compresses against the rim causing the twin puncture "snake-eye" flat. Worse, it could potentially unseat the tire from the rim.

Probably the best upgrade I did to my 80's bike was putting new wheels on it. That had its own problems too as modern wheels don't come with freewheel hubs, also requiring an upgrade fron a 6sp freewheel to a 9sp cassette. Luckily, it was a steel frame that could be expanded to accept it. (Actually, it had already expanded as I was having to compress the rear stays to get them to drop on the wheel prior to the upgrade.