I have a 2008 Chevrolet Reg. Cab Short Bed with a 4.3 liter V6 and a 4L60e, I would like to swap with a 6.2 Liter L92. First... Is it possible? If so is it considered an easier swap or is it a Naghtmare? Could I keep my 4L60e even though it may be a little weak? Could I keep my Computer and Reprogram it? Could I keep my wire harness and make Mods to it? Or should I get a new wire harness that comes with the L92?

What ever information you guys might have to help my swap go smoother would greatly be appriciated, Thanks for taking you time to read this!