08 Chevy 4.3 (LG3) to 6.2 (L92) Conversion?

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!

I would trade it in for a V8 truck and then do the 6.2L swap if it were me. In the long run it will be much simpler and probably save you a lot of dough.

i have a 6.2 in my CC with a stock 4L60e. its starting to show its age (63k) ive been racing my truck the last 20k and its was just a 5.3 for a long time. the 6.2 only has 6k miles on it since the swap, and its made the 60e cry with pain.

im with redheartbeat, between trying to find the 6.2 complete, motor mounts, and blah blah blah. it probably be easier/cheaper in the long run to buy a 4.8 truck and swap in a 6.2 if i had to rebuy my truck, id buy a 4.8 CC and swap in the 6.2