> The problem is that in the back at the top where the evaporator for
> the A/C
> that enclosure is slipping down because the little plastic pieces on
> each side
> are breaking from age. You can push the whole assembly back up but,
> of course
> it won't stay.
> I need some direction as to how to secure it before it breaks away
> and comes
> crashing down with the evaporator and the rear speakers etc.
> This is on my 1987 Van with factory air.

i solved this on my 88 bus with some aluminum strips (like 1/8" thick
by 3/4 inch wide and whatever length was necessary to cover all the
hold-it-up screw/bolt holes in the plastic cover.

got some 3M Structural Adhesive (2-part epoxy) and glued that sucker
behind (ceiling side) the plastic. let it cure overnight, then
carefully drilled holes for the screws/bolts. then bolted it back up.
also filled in some of the cracks with the epoxy while i was at it.

cautions:
- epoxy sticks to EVERYthing. :( use tongue depressors or (like i did)
folded thin cardboard (ok, so it was old computer punch cards i had
laying around). :)

- that sucker is HEAVY when you take the screws/bolts out!!!! be
prepared. having a big strong (but stupid) friend helps a lot!

hope it helps. good luck!
joel