It was a good article with a couple exceptions.
First, they used a hydraulic roller cam that was extremely mild. It would have made the same power with a solid lifter flat tappet cam, maybe a little more. The grind used was suitable for the engine's intended use in a pickup for trailer towing but the expense of installing a roller cam was not justified.
Second, they don't tell you in the article that they installed a Holley 750 CFM carb and picked up another 30 horsepower compared to the Edelbrock 800 CFM in the article.
Also, they ported the heads and act like anyone could do the same thing. Don't believe it, you can ruin a set of heads if you don't know what you are doing.