I'd be interested in any feedback from users of the CHI 3V alloy cleveland heads and possibly the matching CHI dual plane intake. http://www.chiheads.com/ & http://www.chiheads.com/cnc_ported_3V.php Also, what cam and carb setup are you using? Any engine or chassis dyno numbers? Thanks Phil de Tomaso Longchamp GTS 3061 London, UK