One day I will find a 2002-2006 Chevy/GMC 2500 with the 8.1 liter in it with Allison transmission which I think was std starting in 04 with the 8.1.
That's a great body style. That engine is used in big U-hauls and is first choice for big motorhomes buddy. Go for it, you'll be feeding that big block sob though!!