This evening, I pulled the front wheels off of the truck. I was going to check out the brakes. But I decided not to open the drums right now. So I started scraping 37 years of gunk off of anything that I could reach. An old flathead screwdriver seemed the best tool to do the trick. And what a pile of gunk it was. I'll try the rear wheel wells some other time.
I fought a little more with the driver's seatbelt bolt. But I gave up quickly. That bolt is stuck and still installed. Once again, I gave up quickly. Maybe another night.