As some of you all know I have a 1970 454 S/N 3963512 with iron oval port closed chambered heads S/N 3872702. (Flat top pistons) I have a crane powermax cam with .553E / .534I lift, .236E / 226I duration with 112 Lobe separation. Headers, dual flowmasters, mallory hyfire 6A ignition box and mallory HEI dist. I'm thinking about installing an edelbrock dual quad intake with dual 600 CFM edelbrock carburetors. Summit sells a complete package part # SUM-CEDL322. for $1,139.95 What kind of performance can I expect with this dual quad setup over my current single 750 CFM edelbrock/holley intake?.....Thankyou