EngineMasters Episode 21 408/410 stroker w/ported heads

I always take these kinds of „shows“ with a big grain of salt. After all it’s a magazine thing to entertain people (and please the sponsors) and not to really give profound information (too many details left out about pretty much everything), IMO.

They want to show a huge gain for that publicity effect (and to make Dulcich a hero :p ), but a few things are off for me. So even with standard Edelbrock heads the first pull was only 448HP (?) at 5200 RPM… kinda lame for a 241/247 cam.
Or is the mismatch of heads, intake and cam that BAD (really BAD) that it not only kills torque but also horsepower? (--> J.Rob?)