If I'm not mistaken, didn't Fred Chruch's Bobs coasters utilize a similar arrangement, with metal plates that acted as an alternative to upstop wheels?
I was on the Kennywood Thunderbolt about 5 years ago, and if I remember correctly, the headlights didn't work (perhaps they had been covered over like I see in pictures of the Lincoln Park Comet trains). I do remember seeing pictures of the Conneaut Lake Blue Streak with operating headlights... does the Camden Park Big Dipper operate the headlights?
Also, I think the Century Flyer trains on La Montana Rusa were modified by CCI a few years ago, I believe the fronts of the trains have been replaced by some kind of ornate decoration, therefore the trains are not true Century Flyers anymore.