The DOD delete is just done in programing. We disable the displacement on demand in the tune.
The LS3 conversion means we need to remove the cylinder heads to remove the lifters and relace w/LS3 ones, the cam is changed, and the timing set & tensioner/guide. So it involves a ton more labor. To do a simple cam swap we just swap the springs on the heads w/out removing them and just have to remove the rdiator assy & water pump, pull the dampner, and remove the front cover. Dont even need to remove the intake manifold. So most of what your paying for a a ton more labor as well as several hundred more in parts (head gaskets, head bolts, etc.).