6 liter V8 Chevy Vortec question

As a GM guy the biggest thing on any of LS base motors is to get the computer reprogrammed and get rid of the torque management. You'll be like why the heck wasn't this done from the factory in the first place.H ad a 6L and a 3/4 ton you put your foot into it and get the 4,000 RPMs and watch the motor pull timing and drop RPMs plus and it shifted kind of soft. Trust me look it up on the GM forms you'll see that reprogramming the computer is the best thing since sliced bread on those things, especially turning off the displacement on demand that doesn't do anything but ruin a motor