[mr0077]

347, not sure I understand what these guys are tellin' you. Never used webers but most (all?) who do say their idle is better with the webers than with standard carbs, if set up right. Long duration also plays hell with idle; my duration is 12 degrees shorter than yours, but I have VERY good drivability with my solid flat-tappet: 571 lift, 236@0.050, 110 lobe separation, 750 rpm idle with a nice lope.