Hybrids will not give you a gain in fuel only. I gained 6hp by going from stock diameter plungers to 1mm over with the same oil demand. If you need twin pumps for 700hp then you should just sell your truck and buy a 6.4. Can anyone on here go back and read through old threads and get info? Shawn broke 700 with the dually, my orange truck was well over it before it decided it didn't like the block or rods, and its about to be well over it again. You need 205-225cc sticks, and compounds. Most importantly a truck that likes to make power. These trucks have a mind of there own, especially when people get other internet and listen to some keyboard racer about what to buy. Then they spend there money on cheap knockoff parts.