viewtopic.php?f=72&t=2701&hilit=CV+bootAs is usually the case, it has been discussed, at length. It helps that I've been here awhile and remember a lot of this stuff. For future reference, using Google, trailblazer CV boot site:forums.offroadtb.com shows the thread I linked first. If you type in your search words and then site:forums.offroadtb.com into google you'll get a really solid list of threads, works a bit better than the site search.
The CV binding, in itself, won't cause the boot to rip. Generally the boot just isn't flexible enough to operate at the angle you're trying to get it to. Most CV boots seem to be made of a cheaper plastic that self destructs relatively quickly in a lifted application. The Detroit axle pieces have (had) better materials for the boots and they hold up accordingly. Kyle is the one that pointed us in the right direction originally as I recall... I didn't go back and read my own thread.
If the CV itself is destructing, I find it unlikely your angle is a problem, I ran a 3" lift and 89s with washers on the shocks with no binding, there will be other more dramatic representations of the problem if the CV is actually binding.
As an added note, the CV angle won't change by flipping upper control arms if you have a good alignment already. CV angle is dependent on the angle of the spindle to the differential. Flipping the upper A arm does nothing to affect this. It does put the upper ballpoint at a less extreme angle. The reduced angle keeps it from maxing out and allows it to transfer the load at less of an angle since the joint isn't at a 40ish degree angle or binding at full droop. But that's about the extent of it.