Building a 71 coupe that someone else tore apart... have all window stops that my Fisher body manual shows, but have 2 Mystery ones that were with the 1/4 window tracks.... They look like a stop on a window regulator to me but not finding where they go.... Mount with a 5/16" bolt

http://1stgencamaro.net/gallerytwo/d/7435-1/mistery_stop.jpg

That doesn't look very familiar to me, perhaps they were extras from another project?