My father made a really sturdy rear bumper that could also have a hitch
attachment.  We are asking $100 for the bumper which is made of 3" pipe,
capped at both ends and welded to the stock bumper mounts.  We would need you
to mail us the bumper mounts as well.
Let me know if you are interested.  On my website at
http://members.aol.com/kenwilfy I have a picture of my '84 GL with the bumper
on it.
Thanks
Ken Wilford
John 3:16