Lowering without cutting the bed?

[Morris315]

Hello guys, I'm wanting to lower the rear of my truck (65Chevy 3/4 ton) but I don’t want to cut the bed. Also my plain is to be able to haul a trailer with it so I'm going to put air bags in the back and do a small notch. I want to have it sit low and still have some good travel. I would like it to sit like it dose now but with more travle room. Lets see some picture if you got'em and tell me what suspension your running, thanks.