Well you came to the right place. Lots of guys have done a similar swap with the LS1 and 6.0 etc... I am sure they will chime in.
You will need the computer and harness from the 6.0 to make this work. The motor mounts are different etc. but really no show stoppers. You will definetly be glad you made the swap.
'02 1500HD, 6.0L, magnacharger, 2000stall, custom magnaflow with electric cutout, E-fans, Nelson custom tune, Auburn LSD.
'79 L82 vette, Summit 355, Dart Pro1 heads, Comp 274 cam, Holley TBI, Built TH350 with 2500stall
'93 Blazer, full size 2dr 4x4, new project.....