Hi Ed,
  We are going to do this project .You can be sure I will take lots of pics.
I shall be using the stainless steel pipe and thruflow muffler. Donaldson have a vast array of suitable product for both exhaust and engine air intakes  http://www.donaldson-filters.com/products.html
We are heading up the West Coast in the spring and are planning a visit to Beaver Coach Works.