Moose,
You will love that GDP-392. I put one on mine, and it screams now. Just from the additional fuel, on 7x7 on the TST, it will smoke the tires in 4th, rolling. I have a turbo sitting at home, waiting to go on there, since this activity will kill the stocker that's been on there since new. The GDP gives me a solid 22psi at idle and even on 9x9, I can only pull it down to 17psi. It was an easy install, and all the parts were there. No running to the store to grab a missing fitting or something else. Good kits, and it runs as quiet as the stocker. I know one guy that has had one on his truck for a couple of years now, cranking out 645hp and it supplies all the fuel he needs.