Converting the 4wd to 2wd may be expensive being as new as the 6L80e to the world. The 6L80e will be pricey IMO. I'd like to try one of the L92 conversions but if your truck is 2wd the 4wd setup will be counterproductive to your success. If I were to guess I would think about 5k for the complete drivetrain, harness and PCM. Not sure about the a/c but I've always done the Street and Performance High Right Side a/c conversion, about $1000 extra with installation.