QZY-Neil, I looked at the link and couldn't get much info other than I should send a note... I'll send a request, thanks.
Made a couple Pair Valve block offs. I don't need to inject air into the exhaust.... although I used the setup in reverse on the Kid's 1000 bike runs to pull vacuum on the crankcase. I threaded and put set screws in the orifices, had to leave the reed valves in, they are integral to the seal. Pic has what was replaced and replacement.
Still thumping on the exhaust... I decided to fit the outside tubes, add a couple of tacks to keep everything from moving and changing constantly. I think I can now pull it off and try to fit tubes on the bench... we will see how this works out... I have 1 1/4 schedule 10 to play with if the .063 runs out of parts...
Good thing it's February instead of July