Today I spent most of the day visiting multiple wrecking yards in search of a 6.0 LS Engine for my 57. Finally after 250 miles and at the 5th yard I found what I was looking for,a 2002 6.o from a 2500HD ( I don't care about the extra 80lbs of the steel block) with a 4L80E transmission. I scored the entire liftout package including all belt driven accessories,starter, all wiring and ECU for $1200. I'm quite happy and looking forward to install.