Ive been a long time lurker here, and am finally getting ready to swap a 96 5. 9 into my 99 F350SD. This forum as well as the Cummins conversion forum have been very helpful so far, and now I have a few questions. I am going to rebuild the motor and o-ring the block while it is out of the truck and am going to order a rebuild kit from Cummins. I plan on running 370 injectors and was told by several individuals who are diesel techs that running marine pistons will be more efficient than using automotive pistons. Does anyone have a marine CPL for a 96 5. 9 that I can use to order a rebuild kit and get the right pistons at the same time. Thanks in advance.