I know the 12 valve 6bt cummings engine is much easier to put in a m715 and that you can turn up the horse power with a screw on the fuel pump . So i have 2 questions . 1 how much hp and torque can you gain total and how and what parts do you need to use to get a much higher hp and torque out of it ??? And for # 2 on the 24 valve common rail isb engine , other than it being much more complicated to install because of the wiring and computer would it be a good choice for our trucks ??? Also what would you have to do to it to get the hp and torque up in it ???? As for me im a electrical engineer and the wirring and computer is not a big deal to me just want to make sure that the engine i put in will not be regretful later down the road and wished i went another way . As much imfo and opion as you can give would be helpful im sure .