On Sat, 1 Aug 1998 22:47:54 -0400 you said:
>The seam is filled with some sort of rubber.  Is this the way it was done
>at the factory?  If so, what should I use to replace it?

yeah, it's a pretty standard auto manufacturing technique ... it's a modern
replacement for the old lead filler (which turned out to have toxic fumes).
one after-market replacement is 3M Body Seam Sealer, part no. 08405. sold
in a caulking gun tube, at most body-shop supply stores (the people who sell
bondo, paint, sandpaper,and the other supplies needed by the body repair
people). look in the yellow pages under Auto Repair.

hope it helps.
joel