I completely understand the limitations of the build I used as an example which is one reason I used it. Even in my example a 260 adv. dur. cam worked REALLY well which made me feel that the 252 cam OP is considering seems a little low. Hmm. Another thing, I fully understand that custom grind IS "The Way To Go" but is there an off-the-shelf grind that has the 108 lobe separation and faster closing ramps that some have suggested the 273 responds well to ?