I got her her hooked up another under estimation man this thing is loud my daughter could hear it a mile away and thought I was a block away. Not sure what happened but the feed line from compressor to tank got hot or something and blew the end clean off. So I just made one out of copper.
I also put the 1/2 valve for horn and a little smaller one for the dump, no gasuge yet. Works great and kicks butt. I will have to send pics of install mounted where spare was. Pump and tank in bed with a cooloing fan since I have a fiberglass bed cover.