How does cid make power?

273 said
Thats a 3% different by equal or even I mean practically, there a less than 2% peak hp difference in the curve it's a wash and with gearing torque is basically wash too, for a 50 cid $3000-4000 I wouldn't call these wins and be upset if I was convinced this was the way to go. 2% got to be in the margin of error between to identical engines. I picked those gears with 26" tires in mind that difference is equalled if the 410 had a 27" instead of a 26" 410=3904 vs 360=3912, If you want to see these as wins that's up to you.

A side note yes more torque is a gain but less powerband rpm is a negative when it comes to power not always cancelling each other out but when I laid the two power curves over one another it practically did. Losing rpm in the powerband might be a bonus in driveablity but negative in power production.

So, If you don't adjust the combo for the increased stroke/displacement, you get "disappointing" results. What if you do? What if you improve the cam and heads and exhaust?
Take your 273, exchange it for a 408 shortblock with the same compression, and use your 273 heads, a two barrel intake, .398 lift cam, tiny exhaust manifolds, and sure, you'll be disappointed.
Match the combo to the displacement, and a 408 WILL be better than a 340/360 for STREET use. (Disregarding race use of a 340 with rpm to the moon, and 5.something gear)
When I build a 400 into a 512, I'm not gonna keep the 7 1/2 to one, .420 lift cam, 906 heads, and log exhaust. I'm gonna use parts to match the 512 displacement, and expect a LOT more than 2%. I would expect more than a horse per inch of increase.