Huh? The 6L has not trouble at all behind a 403 horse stock engine which is more than most people running modded 5.3's.

Anyone get a 6L to easily work in a swap? Don't think that's working either unless you swap the 6.2 and all the harness and computer.

Are you having trouble with the 6L in the Denali or are you just looking for converter options?? ^^^^