Stripes- thanks I think the GMS muffler looks like the best solution. I knew they fit but didn't bother to look at their stock muffler.
Even if I used JB or got somebody to heliarc the Tower muffler it would still be loud. I live on a farm 5 miles from the nearest town so noise is not a problem there, I just don't like it. I think I will go with 4 strokes on anything larger.

Thanks to everybody.