I cant remember where this came from , I think it goes near the headliner maybe by the rear veiw mirror but I'm not sure.
My 68 has been apart for a couple of years I was bound to forget something.

http://i25.photobucket.com/albums/c88/jr68/2003_0528clip0002.jpg

Looks to me like it belongs to the steering column. I think that fits under the steering wheel for the turn signal switch.

That's sorta what it looks like to me as well, except it's a bit long for the steering column cam.
It's definitely a spring clip of some sort.

It looks like the snap in bracket that holds the one end of the heater core in place. It slides onto the sheet metal and the other side, the pipe end, screws down.
JZ

Is it green because it's tarnished copper, or is it painted green? That is, if that color is green to begin with. ;)

It's copper.

http://i18.photobucket.com/albums/b129/jesseviper/P1010003.jpg

JZ

There ya go... there's your answer. I knew it was too long to go to the column.

JZ is the winner!!!!!!!!!!!! It is used in the heater box to hold the heater core in place. It is one of two. Hard to come by if lost. Way to go JZ!

thanks guys , thanks JZ Im going to go try it right now.
What do you mean there is supposed to be two !!
Oh DANG IT !!

Well I'll be
it snapped right in , you guys are awesome !
and the other one was already in the heater box.
http://i25.photobucket.com/albums/c88/jr68/2003_0529core0005.jpg