Just as I thought... I've never seen a header system like this... wanted to ensure that nobody had created a method to do the valves that didn't require a complete remodel.
Now at least we all have ONE design mistake on our things.
I have the same exhaust. It is not S&S, probably the Thing Shop's dual system. Adjusting the valves can be tough, BUT can be done without removing the system. I use a "right angle" style cheap screw driver. Don't remove the system until you spend some time working with the system in place. Bill