Hi,
I would suggest an edelbrock 750 carb. The edelbrock carbs have a bottom feed system so they never leak. Also they have much better low speed transition from idle to mid range and there is an air flap in the secondaries that will meter the gas according to air flow. I run 2 600 carbs on my 460 with very good response. It is too much cfm but with the secondary metering the air I never bog or stumble,it just pulls hard.A double pumper holley is a good carb for the track only,it will just puke gas and actually slow down on a mild street engine.
Perry.
