Me and a buddy have been trying to figure out what would be the best setup for him to run on his 07 5.9 truck to pick up some more power. Right now the truck has 63/68/14 over 89/96/1.32 with 85% over injectors and dual pumps. My question is what would be his best bet to change to pick up a noticeable amount of power while keeping a nice spool up. The 63 is an older cast wheel turbo not a sxe. Would it be as simple as throwing a t4 housing on the 63 or would you all suggest swapping the whole setup. We are planning on stepping fuel up to at least 150%. We would just like some suggestions on what setup people have ran that made good power (11-1200) and maintained spool up. Truck has all supporting mods (billet rods, 188/220 cam, valve train, etc).