Can I remove the windshield on my 65 myself?

Check with some local auto glass companies in your area. They can still get most windshields. They usually can't get the rubber gasket though. You can get that from www.steelerubber.com . I seriously doubt a 45 year old windshield gasket is going to be reusable. In which case you can cut the rubber and get the glass out easier after removing the lockstrip. Wear heavy work gloves in case you slip or drop the glass so you don't cut your fingers off (seen that before).