Hey man. If your worried about changing the suspension on your truck. Have you thought about buying or building an air reciever to go into your hitch. Then you wouldnt have to have an onboard compressor or tank. its not permanent and improves the ride and handling of carrying the trailer.

http://www.airsafehitches.com/receiver_hitches.html

 

He's trying to stiffen up the rear suspension so it doesn't sag as much when has weight in there.

 

i didnt read every post
but once you get the brackets and bags, run the lines to your bumper to a shrader valvle. air up the bags with a shop compressor to the correct ride height.


or you could make a 2nd shock mount and just run pins with clips like on a trailer hitch to connect them and run air shocks. that would be your cheapest route and would get the job done, 2 shocks, couple feet of line, and shock mounts