Yep got the gauge in at this point. Yeah I'm familiar w/Megasquirt, use that on an SVO. Guys in the turbo Ranger facebook group suggested keeping the OBD2, and I'll be using I think it's called SCT's Pro Racer app, along with the SCT handheld, for tuning. Truck's actually been done/ready for 2 weeks now, but it wasn't til after that that I found out I'll need this app. Already had the handheld device. We'll see how it goes