We also replaced the rusty sideview mirrors and both of the driveline half-shafts complete with four CV joints, but that turned out to not be the source of an annoying clicking sound when making left turns. More diagnosis to come once it's running again next week. Lastly, I finally found replacement gaskets for the round stop/turn/reverse lights and sealed in some really bright LEDs that should be a snazzy safety enhancement.
Speaking of safety, one student demonstrated the value of safety glasses after carefully removing a window, cleaning and lubricating the chain-drive regulator, and reinstalling it, only to have the window shatter when he turned the crank. No good turn goes unrewarded, but that window was luckily a match to all of the big brother Grummans, and replaceable for only $30 from Mill Supply!