With that long arm and only racing this engine, especially if you plan on racing Super Gas, I would do everything in my power to make the recip as light as possible with a CW for each rod journal. Why not at this point? IF Super Gas is where you will race and of course you want to be competitive, I think it will go past 7,000rpm. Aluminum rods are up to you but at >900hp power levels I would stick to the BME r&r program. Of course this is all money permitting. My twocents worth...