U say airbags so im assuming you are talking about factory ELC. it is possible to install switches on the factory system to manually lower and raise the rear of the car. for the front you could install more bags or just cut the springs a little.
The only thing you can do to the ELC is jack it up all the way for racing, I don't think there is a way to lower it completely
I can't remember the thread we were talking about lowering, someone had a good guide to what needed to be done so you could use W body parts to lower the car since there are parts made for the GPs and Regals