Same way stuff ends up in publication. The editors are not experts. They count on writers who have checked their sources, and in magazines like this they generally don't dig too deep.
The good news is the person who suggested using the 340 cam (and 360 heads) in this thread, did so back in 2011. So hopefully you guys have put the final nails in the coffin.
Now how 'bout running those same numbers for a 340 cam in a 340? :)
What happens when dropping the compression (with shorter piston '72-'73) or similar builds where folks reduce compression to 9.5:1 or less?