Dyno testing a stock(?) 1972 440

Kim La Roy’s engine wasn’t just some worn stock build. It was machined to exacting tolerances. Sure it was low compression but it had near perfect bores and a few tricks we don’t know about. He is also a Pro engine builder that is a whole lot smarter than most of us on here. Kim
I don't think the short block was anything special.
The heads well..... that's something different.
all in all I think this build could be cloned by anyone with similar results.