Cam degreeing. I totally don't understand.
Said another way
moving the centerline, simultaneously moves the Ica, and Ica is what traps pressure in your cylinders. This is or can be , important at low rpm, depending on your Static Compression ratio.
If you close the intake earlier, the engine will trap more low-rpm pressure, and have a stouter bottom end.
If you close the intake later, the engine will trap less low-rpm pressure, and reduce your low-rpm power.
But Moving the LSA has another effect. Each 4 degrees is said to move the top end power about 100 rpm. Whereas the next bigger cam is said to move the power 200 rpm. However, moving more than 4* is never recommended because of two other things that happen simultaneously; namely, the overlap changes. and the power stroke also changes.
This why YR can say what he did, namely;
IMO, if you have to change the IVC more than 2 degrees either way, the cam isn’t right for the application.
Sacrificing overlap if you have headers, is giving up power. That is why when you put headers on an old hi-compression 340, they picked up a ton of power, with the now functional overlap, even tho it was quite modest.
Sacrificing power stroke, at WOT is not too big a deal, but when the duration becomes too short, the gas-mileage takes a dump.
Your cam is modest enough that most of these things are just spitballing.
