alright so i looked for that clocking plate and couldnt find it but i have seen them before and for the room for the 5" why not put a 2" body lift on dont go 3" shows to much but a 2"isnt really noticeable and plus u get a more lift for cheap

 

body lifts are a horrible way to lift trucks they ruin the integrity of the truck especially in a rollover. and a body lift will solve absolutely nothing in fitting his exhaust. the exhaust isnt hitting the cab, there is a tight squeeze between frame rail and transfer case