Hi all,just wondering if anyone here has had a chance to test the various alloy heads available for the mighty 351 cleveland,i know of svo,edelbrock,3v pavtek,and airflow research,which is the best head?i have flow figures for the 3v only,and want to compere all heads before buying a set,with a funnelweb intake and roller set up i'm looking for 650+h/p,can anyone offer some advice??