I just signed up in that other part, here's my first question: I have a 53 Buick Roadmaster pickup truck. She's gonna be a little low in the rear when I put something back there to haul. Decades ago, I had some air bags: thick black rubber with a valve stem came out the side. Worked good. I've googled all around. I see air bags- they all look like they have an air fitting right in the middle of one end, can't see how that would work for me. Would air shocks be a good place to look? This car had those old knee action shocks which I lost years ago and kinda scabbed in some tube shocks. (Times was hard back then, no money or tools). Anyone have any advice I'd appreciate it. Thanks!