Changing my bag setup, can anyone help?

[cochino12]

So I recently bought a suburban from a guy that had a bag f/r setup on it. I would like to change a few things and still keep it as simple as possible. Right now the compressor and valves are mounted on the front inner fender and I want to move them to the rear frame rail somewhere and upgrade the compressor, tank.
My questions are:

1. Do these look like push to fit fittings? (sorry, only picture I have and the burb isnt here right not) is so, to move all of this to the back of the truck, all I need is more 1/2 line right?

2. I'm looking at a 5 gal tank and a viar 480 compressor, will that be enough compressor, tank? assuming that I dont want to air up/down constantly

3. How many port tank do I need?

4. am I missing or forgetting about anything?