What's your area of concern? True duals generally are about the easiest kind of exhaust to install. No meeting/mating of front and rear pipes in one place that occasionally causes words of questionable vintage to be uttered at high velocity.
FWIW, I put a set of RH duals on ten days or so ago. Removing the old duals and installing the new ones was about 90 minutes beginning to end. It wasn't rushed. It did include beer. There was likely a potty break in there somewhere. Having the bike up on the table lift no doubt helped a little. But it really is a nice staightforward job.
You are a better man then I. No way could I get it all done in 90 minutes. I did get it done, but will skip on how long it took me.
Trying to find my tools takes most of the time I have found out though...will have to work on getting them straightened out. Working in the sun doesn't help and I decided to just leave it on the ground instead of raising it up. I have a table lift, but no room until we build our new garage.
Anyway, love the bike now...it actually sounds like a Harley.
One question...when you look down into the stock mufflers is that a cat converter that you can see? Looks like a mesh screen?
Take care and thanks.