Nice post Tiefighter.  Too much information is better than too little.

I put my 65747-94 on over the weekend.  After 2 years riding with a mac muffler, the dyna pipe sounds as quiet as I remember the stock sounding.  I know it's actually a bit louder, and I'm sure my new neighbors will appreciate the change.

As you might expect, low end response seems improved compared to the effectively open mac muffler.  No crackle/pop on decelerating like the mac liked to do, though a bit of a puff when I turned her off.

I mounted it directly to the header with one bolt.  I had to drill another hole in the frame's mount because the front hole was too close to the entry point for the rail mount.  The exhaust is pointed towards the brake cable a bit, but there is sufficient clearance.  I don't see an adapter pipe being necessary unless the mount doesn't hold for some reason.

Yes, I resealed the head > header joint and had it loose enough to swivel while mounting the muffler.  I'm not too concerned about it pointing towards the brake arm more than before, and I think forcing it to point away without a 3rd pipe piece would compromise the other joints' alignment.  Having good seals to prevent air leaks is more important to me than getting some soot on a piece of shiny.

Sound advice.