Saw that. So if you kept the compression the same, the cam and heads the same, how much extra horsepower would it make with more stroke.

As an example, i am making a similar change myself right now
Had a 360 with basically stock eddie heads. Ran fine for what it was 10 to 1 compression. 118 and change at 3300
My engine guy told me my 418, with having him port the heads, raise compression to 12.5 to 1, otherwise no changes other than go to single plane over air gap( excellerator) i could see maybe 80 horse gain. Same cam, etc, etc. but tons more torque
That is making the heads much better, and 2.5 points in compression( huge difference, guessing nearly 1/2 of that gain) to gain 80 horse.
What would i gain with heads the same and compression the same?