I am considering adding Firestone Ride Rite airbags to the MH. I found Firestone Kit #1130 recommended for the Toyota cab and chassis. I looked at the installation instructions and it seems way to simple.
You remove the rubber bumper that stops the frame from bottoming out against the axle, install the top bracket by sliding 2 u-bolts over the frame and into the bracket, install the bottom bracket with 2 u-bolts around the axle and into the bracket, tighten everything up and route the air lines. Install air and you are done.
Is it possible that it is this easy? This is the instruction manual for the 1130 kit.
http://www.firestoneip.com/site-resources/ride-rite/installation/1130.pdf
I looked at my MH and there is clearance above the frame for the u-bolts and there is 3" of clearance between the frame and the tires. If it is really this easy, I am ordering them soon. Now I just need somewhere to lift the MH up to work on the thing. Much easier that crawling under it.