ISSPRO EV series from Diesel manor is what I would do. I installed a triple set on the pillar just last week, pyro, boost, tranny temp. I bought a byrd's intake elbow with ports so I didn't need the boost bolt. The whole install probably took me about 4-5 hours tops. It was easier that I thought it would be. Can't help you on the fuel pressure, haven't done one of those yet. Anyway they look and work great, they match the stock gauges perfectly, if you didn't know they were aftermarket you'd think dodge put them in.