After listening to all my friends, the LS "guru's" I bought a 2002 6.0 motor and 4L80E with about 168,000 miles. I was told not to worry about the computer. It is going into a 66 Lemans. Now, I am told that to make the DBW work I should have gotten the computer, but also some kinda module behind the dash too. I was also told that the gas petal was needed and that the Locar will not work. I would like to have the cruise control if possible. I am told , that no other computer/parts will work. I was not worried about the wiring harness, because I planned on using an after market one.I have a blue/red computer for cable. I have access of a 2003 5.3 4L60 complete and running cheep. Could I take that and use the parts for the 6.0. I am told they make a cable to change from a 4L60 to the 4L80. I just wanted a bigger motor as I am downsizing about 1/3 of my HP and almost 1/2 torque. I have to go to an automatic. That is the reason to go LS as built trans for that much torque would require a $700/$1000 trans controller besides the trans swap from my TKO600. Yes, I know it will require a retune.