I will assume You have an e4od and in that case You can just have it rebuild with all the upgraded parts (a member here have one built by Brian something sorry My memory is bad for names) He'll make it bullet proof (I mean it after the upgrade some guys put them behind cummins with lots of fuel) and You won't have to change a thing just forget about it. Money well spent ONE time.
I believe Brians truck shop or bts Is the place you are trying to think of.
They have a great reputation and warranty, as in any HP, any displacement, no restrictions. Aparantly the guy isn't scared to stand behind his work He's only a couple of hours from here, one day I'm going to get a chance to drop by there.