6.1 Swap Won't Rev Past 3K HELLLLPPPPP!!!

Little update here. The ecm purchased from s&p was returned and money was refunded. We sent the other 05 ram ecm to hotwire. They disabled the auto trans, emissions functions, and installed a 6.1 tune with some tweaks to go along with the headers and air intake. Now we have an ecm that we know is right! Yay! Next step is to address the 3600 rpm rev limit, or "limp mode". After talking with the guy at hotwire, sorry I am bad with names lol we figured out something interesting. After closer inspection, one of the troubles codes stood out. The oil pressure code. Well, it seems that the 05 hemi trucks had an oil sending unit for the gauge, as well as one for the ecm. The harness that we havehas no connectors for the oil pressure sensor for the ecm. We have located the correct pin needed to install in the connector at the ecm, and the pig tail and sensor to install in the motor. Tomorrow night I am going to install these parts and keep my fingers crossed lol. Everything points to this being the issue. I will update the thread with the results. Thanks for everyones input.