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
Probe Pistons are discontinued. but appear to be very similar in specs to the L2355 Speed Pros. I'm essentially building the very same build with the only differences being a Torker II and the L2355s.