Probably not as the problem would be the same, the tip of the rocker getting too close to the edge of the valve. They would need to move the pivot point away from the valve to get a longer arm, thats kind of hard to do with the spark plug tubes right there. Maybe .050 or .100 or so and at the same time that could be used to increase the rocker ratio but any way you slice it there is not a lot of room in the top of the head on these things, the good thing is that .650 can access a ton of flow.