Stroker physics - where the differences are?
The really short version is... poorer ports need more cam to keep the valve open longer when good ports will make the same power with less cam.
LOL, great short version Moper. Mal, this also applies to everything else about the engines flowing parts, not just the heads. Intakes, carbs and spacers, headers and there collectors and diameter pipe size and length as well as after the collector. Even the collector itself has see jumps in power with odd designs.
(The problem here is you can test your wallet out of existance. The choices can really be a long list.)
This also applies to cams. Everything about a cam is subject to improvement for that particular engine and the combo as run. Cahnge an intake and the once perfect cam is not as perfect as it could be. Swap headers out for a longer tube version, the cam dynamics change again.
Rate of lift is often spoke about as quicker the better. This is also not allways true. A few times I have seen rags test a certain combo. End up with *** HP and TQ figures. Then they, the builders, figure, well, the cam is a extremely fast rate ramp, lets try 1.6 rockers. Power fall like rock!
Best case for anyone building a engine/car.....know what you want out of it first, then the target can be had.