A couple of things I remember about desmoging my 99 Interstate Cali bike.
1) The vent line from the tank on a cali bike does not have the "T" in the line.
2) The vent lines from both banks of carbs need to be vented, either with a "T" and a small section on hose or like the 49 state model with the hoses that fit into the rear cross brace.
3) Cap all those lines from each carb, I believe there is one per carb with the exception of #3 has two.
4) May have to adjust the pilot jets, I believe the cali carbs are adjusted a little different.
Spot on. The cannister mount could be used to attach a vacuum reservoir for a cruise control.
My eventual solution for my CA-model '99 Tourer is to swap the carb assembly for a 49-state one next time I have the bike torn down that far.
One thing I'm probably going to leave as-is: The cams. This Tourer gets 42-45MPG at 70MPH with them when ridden at highway speeds. I really don't notice a difference in power between my 49-state I/S and that bike.