1960 longbed lowering options?

[smilts60]

I have a 1960 long bed step side, that I'm wanting to lower. My problem is I haven't really done anything like this so I'm wondering what all are my lowering options. I'm not exactly sure how low I want to go but really low would be the best way to describe it. Keeping in mind that I don't want to mess with a pump and tanks if I go with bags. Of course I'm not sure is it possible to have bags that stay at one level full time? I'm not trying to be to vague, I just really don't know much about it other than its what I want.