Hi guys, kinda new to the forum thing, so please bare with me?

I am in the midst of a 6.7 Cummins swap into a GM chassis and need some help please? The motor is a 2008 out of a low mileage Ram 5500 and I do have the ECU, harness & APPS. My main concern is wiring an OBD II port so EFI will be able to communicate and whether the CAN + & CAN - wires will need to be used since I will not be using the original BCM or TCM?

I do have a diagram that I downloaded from the Dodge site that appears to be good but could use your direction please? My concern is being able to use EFI live upon its release to tune and eliminate emissions equipment since this will be an off road NON-emission application.

Again guys, please & Thank U for any direction/suggestions!