IIRC
the power stroke is just a re-branded Cummins design
don't know if Ford makes it under license, or whether they buy them from Cummins
they are in rear because people want to be away from the noise , like the flat roomy drivers area and spacing, they like the engine in the rear
the FREDS are not real noisy, but the drivers compartment is NOT as quiet as with a rear engine
its about noise and comfort
the front engine doesn't drive any faster or get any better economy than the same engine in the rear when drive the same weight
