There is available high temp sealing putty for exhaust
applications.  I have use the Walker brand with ok results.
The trick is having some re-enforcing mesh to hold the putty
as it is weak, metal screen works.  Be sure to get the area
clean, and let the putty dry completely before driving
again.  Do not expect this repair to last very long.
Tom

Matt Said:
> So I'm looking for a temporary fix: putty, bandage, etc.
> I'd consider having it welded, too, but not sure how much
good metal there
> is to work with. Ideas?
>     The good news is that the compression is still the
same after 9,500
> miles of hard driving, so at least it looks like I'm just
saving up for new
> headers instead of a rebuild.
>
> Thanks,
>
> Matt Sutton
> 88GL