Maybe some of you Aussies can help me here. Some time back I was reading in 4wheel and offroad about some crazy air suspension some aussies were using in their trucks. The truck had a V8 for an engine, but used two cylinders for air compressors. The pressurized air was then forced out through small nozzles directly at the axles and this created the suspension. I think they used a four link setup to locate the axles, but just used air to support the rig. When the engine was shut off, the frame just rested on the axles. I don't know if this would be a worthy application for the US or offroading in general. But it sounds crazy and I kinda like it.