I have an 04 250 with an 03 6.0 in it and the passenger side rocker box is stripped out as well as a failed hpop. I know the early model stuff is crap and very unreliable and have heard that the later model parts are better. So my questiin is can i put rocker boxes,rails,branch tubes, and hpop of of a later model engine on mine and if so what modifications might be needed? The engine will be coming out of the truck soon for a freshen up and if i can upgrade it i will while im at it.