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Original post by: Matt ,


anything is possible, but is it worth the cost? if both engines have egr, then i think the truck's wiring harness will work on both.  i  think the motor mounts match up, so the 14l could just drop in. if using 12.7 ecm on 14 l, then reprogramming i would think be necessary. but if 12.7 is pre egr and 14 l is post, then wiring from ecm to truck has to be changed. it costs about 20 hrs labor to change engines if there are no complications.  i think i  would just put that money and just go to a company like pittsburgh power and have them do their thing on the 12.7.