Thanks to all for responding. Let me clarify a few things.

I'll start with what I do know.
I know how far I have to throw the flaps and air brakes.
I also know the total throw can be adjusted for by which hole you mount the rod to, in addition which horn is used.
I know there are specialty servos and servos which can be modified to offer more then 180 degrees of throw.

Then there is what I don't know:
One issue is I don't know how far the servo throws.
Another other issue is I am trying to design the linkage to match the throw of the servo (again, because 100% throw is better for the servo and easier to set up as someone pointed out).

I have a few minor details I'm still working out about where various pivot points and tracks will be placed in the wing, but my main issue is designing the linkages without knowing dimensional data more about servos. I was guessing that most servos throw is 120 degrees since (as someone pointed out) speeds are given for 60 degrees, it would be logical to assume this is a center point, with 60 degrees on either side. From the limited amount of R/C experience I have, it seemed highly unlikely there would only be a total of 60 degrees of throw. Horns are another issue. It kills me that not one servo website I have been to talks about where the holes on the various horns they make are located. This seems to be The Most Fundamental Of Information when it comes to selecting a horn. Overall size is nice to plan internal clearance, but not that helpful to me in this case.