In a word, NO. Great question though...
While a radical drop in ride height can cause the pinion angle change, the 4 bar setup we have doesn't allow a large change. So, as stated, you don't need them, however, you could benefit by tweaking the pinion angle...that is if you spend a lot of time on the 1320. And if you are dropping it, I'm guessing you don't. Otherwise, I wouldn't bother.
Nonetheless, if you don't have LCAs, I'd highly recommend em, for street, strip, auto-x or anything in between.