440 Source Head Opinions?

based on that screenshot, the PP 240 heads were 60HP better than the 906 heads and peak HP was the same RPM.
that is on a mild build too.

that seems pretty good. I'd also wonder if these were some pristine example 906 heads that came out of Dulcich's stash or something too. I know they do recycle alot of parts and builds to keep the content rolling out consistently...