I have a 07 Z71 4x4 that work bought me and I go from fast off-road with no load, to towing or carrying heavy load. I dont want the air bag rear or helper springs as they will limit/change my articulation or spring rate. I just want an adjustable air shock that will bolt up. I have only found Gabriel and Monroe that build an adjustable air shock but neither company lists one for my truck. Looking through their manuals at the specs, it I found the Monroe MA775 matches the closest but I may have to make a couple mods. Anyone know of one that is built to just bolt in to my truck?