I just posted to @Boden 's thead about the most beauiful Hot Rod/Custom engine. https://www.jalopyjournal.com/forum/threads/most-beautiful-hot-rod-custom-engine.1169523/ that the lowest horsepower per dollar engine to build is the flathead, but then this got me to thinking. How much horsepower (and torque) does the average flathhead actually put out? with better cams, aluminum heads and manifolds with multi carb set ups and such. Post dyno results if you have them.