I just find it really odd that it made, as he put it, "waaay less" than it did with the RPM heads.

A few years ago(4-5) I built a very basic bracket 416 for a friend on mine.
Bowl blended RPM's, super victor, old school 850, easy-on-parts flat tappet cam, ductile 1.5 rockers.........even that thing made just over 560hp.

It's like ....... 560hp from that combo is(should be) a slam dunk........and now it's making less with the new heads??

I guess one thing in particular about the BPE heads that surprises me is, it doesn't appear they did any testing of those heads on the dyno vs the other stuff they are competing with.
If they did, it doesn't seem like it's common knowledge.

Since I know both Rod and Vic are "small block guys" I just assumed they would have been all over some back to back dyno testing.

Like I said........ more questions than answers.

I will say this....... it wouldn't surprise me if it turns out there was some other "issue" that was contributing to the disappointing outcome.........and that some similar head swap test in the future ends up yielding different results.