Originally Posted by keith_2500hd
rickdlance swapped LLY heads on his LBY, can't do with 2001/2 only 2003+ because of Computer electronics stuff. saw write up on conversion while back. pretty much engine components go back and forth, just improvements for power with age.
Mostly it got rid of the injector problem for him. He also was running mostly lly's so it helped him with stocking parts.