Thanks for the info mangolo.

I will post some pics of my current "Conversion Muffler" on my big Tecumseh. Used a 3/4" conduit junction box. Has a removable cover an gasket and can be had with outlet in various places. Price is right too. Really nothing more the an exhaust diverter, but for now it's the ticket. As soon as the ignition comes in, I'll fire it up and see what the neighbors think!