So I found this book that I geus someone on this sight has writen. It goes into depth about doing a duramax swap into the gmt-400 platform. I plan to get the book cuz it just sounds good. I have a 2002 chevy 2500hd 4x4 out back with a 6.6l duramax. The body is crap but motor is still in good shape just wanted to see what u guys thought about the idea.