Not that I’m knocking your choice of approximate cam duration, but as you said, it is really all relative. Your cam is a 6 degree increase, which is small. Often considered one step up in size. I’d also say the same on lift only against the heads best flowing lift. While you don’t have to lift the valve that high to actually make power, if you can the valve lift up there to take advantage of the higher flow ability of the head, there’s some more power there. The difference between a mid .400 lift or a .550 lift is good. If you can push it a tad with a rocker ratio, even better, and better yet, a little more duration at the higher lift starts to really move some air and make some more power.
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