Carb recommendation 440

For 550 Hp i agree the RPM performer dual plane And a 750double pumper tuned correctly will work fine for you. Be very responsive, and will give you good drivability.

Thank you all for the input. I want to get away from the dominator because they are known for their full throttle performance and sluggish slower speed and cruising.

I see a few suggestions for the double pumpers. That’s a mechanical secondary correct? Wouldn’t I have better cruising speed drivability and fuel economy with vaccuum secondaries? I’m not looking to have a distance driver in the economy department, but I would at the least like to find a way to get to 10mpg. Is this an achievable goal?