Air beams after a certain age leak and it is best to just plate the air bags. You can weld them and seal them all kinds of ways but in the end they will leak. It was a good idea that didn't work. Just cover the seat rails with plywood and forget them. I'm sure that there are those out there that don't agree but you don't see air beams on anything after the 9's.
I know this is kind of silly. But what is function and reason for the air beams.Ray