The blue GTX on his web site is mine. 5.7 /NAG1. Get the TCM from Russell. He was the FINAL solution when I built my car because NO ONE knew how to program a NAG1 when I did this swap it was 2014 or so when the people who sold me the computer gave up his name as the source since they screwed me over for 2 years before they finally admitted they could not program it.
HE is the NAG1 GURU!
It is an AWESOME performing set up. I get 18-20 MPG and have had even better when I am FORCED to keep it at 65mph. PLENTY of power, lots of speed. I have an 8 3/4 with 2:76 gear. You will love this set up for cruising and daily driving. Performs well on a road course too. I have not had it down the 1/4 yet. 14k miles in 3+ years and not one problem!