yes you may get more area under the curve by over lifting the valve than a cam with less lift but the same duration and ramp angles. I'm no cam/head expert but I would rather do it with duration and ramp angles. size max lift to the head flow and duration/ramp angles to the size of the engine. The same head on a 440 vs a 540 will want very different grinds and custom ground cams are not that much more money. Theres more than one way to skin a cat as they say. Sounds like a good test scenario for a magazine article.