Thanks John, that helps a lot!
I wonder if your local muffler shop kept notes on what they did so perhaps I could get them to make me a copy of that header piece without my having to bring the truck to them or another shop. It seems to me that there might be market among Stovebolters for at least that part.
Since your engine is a 1960, I wonder if its location relative to the side engine pan is different than my 1954 235 due to motor mounting differences?