If you are planing on going over 700, you NEED billet rods. These are a great choice!!
River City Diesel Billet Connecting Rods feature an improved H-beam design to save reciprocating mass and use military-spec, aircraft-quality, chromoly steel, which is said to be similar to 300M. In addition, these rods are triple-tempered, surface-peened, cryogenic treated, and balanced plus or minus 1 gram using ARP fasteners. All units are Magnaflux-inspected and Rockwell hardness tested. These are the strongest and lightest 6.7L Powerstroke rods on the market, guaranteed!