I have the '89 718a, 6 speed cluster and triple of course. I left it pretty much stock except for a tri saddle, Neuvation wheelset, Ultremo tires and Stryke aero bars. It's a tri trainer, but since I moved I don't have wide, quiet, smooth drags to lay down long pulls in an aero position.
I got a lot of compliments on the color and the flow of the frame. Pretty bike.