Yes, I'm putting it back together now.  Where the 2 header pipes join
to the collector, there is not a lot of metal there around the
circular surfaces that must make the seal.  I cleaned the surfaces
with wire wheel and used nice new gaskets.  I've heard of using
double gaskets there and wondering if that's the best way to proceed
or if there are other suggestions.  I wish there was some sort of
sealer that could withstand that environment but I don't know of
one.  Thanks for any tips.

Edward