Sorry DJ, I don't know numbers...if you can post a pic?
Basically you can make any HD muffler fit, some take a little more effort.
No crossover tube at the front, and you don't have to plug it. Rail mounts are rumored to bolt right up to the hanger bracket, tab mounts you may need to drill a new mount hole in the bracket. Some folks have added a bit of pipe to angle the muffler out away from the brake lever, I didn't.
Connecting the muff to the pipe will require either cutting a bunch of extra slots in the muffer end to let you clamp it down (I did), or using strips of tin can to build up the diameter of the pipe. I also shaved down the factory gasket to help fill the space. Or figure something else,... the point is the muffler I.D. is a bit bigger than the pipe O.D.
It's all just a matter of riggin'. It's all possible and the challenge is great fun. Share your ideas when you're done and if you can show pics, better yet...
Here's a pic of mine, I used a piece of chrome muffler pipe end from AutoZone to cover the clamp joint.