After a protracted struggle I finished modifying my muffler.
muffler - after modifications by
Kevin Frank, on Flickr
I replaced the two 2.5 inch outlet pipes with 1.75 ID pipes (same as the header pipes). I'm hoping that by decreasing the size of the outlet pipes it will help to muffle the noise a little better. Getting the bottom pipe to make multiple curves in a lot of directions, so that it would exit in the correct place, was a real nightmare. I had to cut it off and re-section it 4 times to get it right. At this point I think it has as many welds on it as it does pipe.
Getting the top pipe to exit inline with, and on the same angle, as the bottom wasn't easy. It was a lot easier than the bottom pipe though.
and a picture with the muffler in (before hanging it permanently) showing the exhaust tips exiting where I wanted them to.
tail pipes - before hanging muffler by
Kevin Frank, on Flickr
I have to get the muffler hung and then on to the rest of the exhaust system.