Suspension Lift Chevy Caprice 22" rims?

Heres my situation. I currently have a 1994 Chevrolet Caprice Civilian model with standard everything. I just recently put on 22" wheels with 265-35-22 tires. The clearance is limited as you can imagine. However, there is no rubbing of tires or any of that. What i am looking for is a lift in the front and rear of a couple of inches(preferably 3"). I have had rear air shocks before, years ago on a 1986 regal and it did the job. So...thats pretty much where i am at now. Not really sure which way to lift it,e.g. cups, springs, shocks etc. Also i dont beleive i have seen front air shocks so that may be out of the question, at any rate let me know what you think i appreciate your help and time. Thanks