Yes, the ported intake picked up 25 hp over the cast intake. I think the best we ever made with that 470 was 780 hp. That was a pump gas engine so we had to be super careful with the camshaft selection. Higher compression would've allowed us to make more power. I think we could've gone over 800 hp if we had put a little more compression in the engine. I've done quite a few 270 head engine since then but none have made that much power. Most engines we do are for street guy or bracket guys and neither of them want to break the bank to pick up the last 50 hp in a build.

https://www.motortrend.com/how-to/dyno-tested-vacuum-pump-help-engine-make-power/