Might have found a snag in the air bag plan... my VX is in the shop getting some new O2 sensors so I can't go look at this myself. What does the spring seat look like on our VX's? Is there a hole for the valve to stick down through? Take a look at the instructions here:

http://www.catalograck.com/imgVD/AIL/MN-131.pdf

I know they say Escort/Lynx/Tracker/Sidekick/X90/Vitara/Grand Vitara/XL-7 but this is the same part # they have listed for our VX's. As you can see in the diagrams, if there isn't already a hole in our coil spring seat we'd be required to drill a 3/4" hole to allow the valve stem to stick down through. Can anybody verify what our coil spring seats look like?