That motor looks a lot like the 500 I am putting back in the KOS Demon. My B1 heads have a water outlet between the center ex ports also. Goes to the suction side of the Indy reverse flow /CSR water pump. Single stage fogger on 10-1 CR. Nice job getting 900 on pump swill. You guys didn't spray it?

Question on using pump gas and NOS - do you use pump gas for the NOS system? I want to change the car's plumbing from a separate tank/pump for the NOS and just use one regulator for both the carb fuel and the NOS fuel. Doing that what size main fuel line to the regulator to support the carbs and the NOS? I think the carbs are an-8 and the NOS is AN-6, with AN-10 from the tank/pump. Doing it that way I would have to dead head the regulator as the only remaining port on the regulator is for the fuel pressure gauge. I am guessing the motor will make around 600 on the motor, and I have 250 HP jets installed for now.