Thinking about doing this 440 build at some point -- opinions needed

I am thinking about doing this 440 build at some point. Do the power numbers add up? Anyone have any experience with a similar build? I would most likely use adjustable rockers though. Maybe even one step smaller cam.

How You Can Build a Stout 537HP Street 440
I'm trying really hard to stay out of things now, but just to remember my dad again for a little while...........440 dyno tests using the XE285HL cam.

'Pop's Engine' another 440 on the dyno.