620Hp small block

Hey all,
I just got the new issue of Car Craft and there is an article in there about building a 620 horse small block based off of a 360. Nothing looks too special just a .060" over bore and a 4" crank, making the 414 cube monster. It could be taken to 440 with the 4.25" crank. Id post a link but I cant find it on their web site.