If your M54 is a Multifuel you can turn up the fuel a bit with the IP to give you a little more power but dont expect miracles because your not going to get any! Also keep in mind this "MODIFICATION" to the engine is also going to greatly increase your potential of some very bad problems in the future, you would after this MOD want a Pyrometer so you can keep a close eye on your Exhaust gas temp which will then be controlled by the drivers right foot, stay in the throttle to long and you just burnt down your engine, that means DESTROYED! In looking at your pics it looks like YOU will NOT be the only person driving this truck, turning up the fuel in a truck with multiple drivers and each having different experience levels with these engines is a very good potential for some very serious problems!! These trucks were designed and built to accommodate vastly differing levels of experienced drivers and still live, that is a safety factor your removing! In my opinion I would say that YOU GOT WHAT YOU GOT, and leave well enough alone, if you disagree that is fine also but I will say good luck! Nice looking truck also!
Karl