if i would of done air...i would of used the universal chapman air struts that AVS sells
http://avsontheweb.com/product.php?productid=781&cat=476&page=1 The lower mounts would have to be fabbed up and either make new upper or use the factory upper mounts. i helped install those on a lexus gs300 and they werent bad. of course i prefer hydros cuz they go lower, lift higher, and ride better, and no annoying compressors.