Originally Posted by jamesb0
you'll need to swap the ECUs as well and the 1500 is not made to put out the right amount of power and toque for a 3/4 ton truck
Not true. They are identical engines, same programming, same power output. You will need to reuse your sensors to properly interface with your harness. Intake manifold might be a little different. Also 04 1500 has egr, but if I remember right 2500's do not (this will be on a cylinder head).