Where are you getting 2%. Are you cherry picking the point in the curve where the two motors were the closest? Doesn't look like you're using average horsepower.
Do I have to for that point, yes I used peak, we don’t have the average, would need to write down every hp @ every 100 rpm from imagined stall to shift points since it would only be a guess.
The 367 has more lbs~ft per cid than the 410 and doesn’t need much more rpm to make same peaks that’s telling me the 367 is pretty efficient compared to the 410 and that makes me believe it probably has a better power curve between stall and shift points but I could be wrong :)