Just a quick update:

I repaired the exhaust ring by brazing it with something called "Sil-Phos" rod. [sm=thumbup.gif]

It did the trick.

I just ran the engine again, full power and leaned out to peak rpm and nothing came loose like the Stay-Brite silver solder did. [:@]

Something I noted, was with the exhaust ring the maximum rpm attained is down about 300 from running with all straight open pipes. So it's a bit of a trade-off. But the sound of the ring muffler is just so awesome! [sm=thumbup.gif]