Ok guys recently had my rochester 2gc rebuilt on my 283. Started out good but running too rich and fouling plugs. I ve adjusted 6 times and still doing it. So thinking about upgrading to 4 bbl. I am putting a edelbrock 2701 intake, but curious. Which is better the edelbrock 1403 500 cfm or the quick fuel slayer 450 cfm? What you guys opinions? Or just buy another 2 bbl and try that?