Ok I have to play dumb here. I am much more of a boat guy and although boaters would kill for 20 additional hp, in reality that much on the water does very little in overall performance. What kind of extra dead stop acceleration would be gained with 20 extra hp on a swb bone stock tv with the 5.3. How about passing acceleration? I think the 2007's variety is stock at 303 hp and 330 tq.