Jared, you are correct, there is a CC rule in Stock. I do not know if the heads from Sorenson's car were poured. Supposedly all Stock teardowns are to include a volume check of the runners and chambers. But yes, the ports on a big block are plenty big. In fact, they do not respond to the now legal "bowl hog" modification, open up the ports, especially with 0.520" lift, and it will not recover on the shift.
If Ed actually knew anything about the heads, and what does or does not make them fast, he'd know that what he is claiming doesn't ring true at all. Of course, Ed could surprise us all and tell us exactly what it is that has supposedly been done to those heads. Because "ported", and "acid ported" ain't gonna work. If you know so much Ed, tell us where metal was removed, moved, or added. Anyone who knows about heads will know immediately whether or not you know what you are talking about. They'll know whether it can be spotted in tech, too.
Ed, I have a Super Stock engine in the shop. I can tell you for certain that the rockers, studs, and lifters for the Stock engine are well less than 1/2 the price of the stuff for the Super Stock engine. Try buying the Jesel stuff that goes on a Super Stock engine sometime Ed. You might learn something.
I suppose you are hung up on the rumor that flew around 2-3 years ago about supposed "tunnel ram"
dual plane Chevy big block intakes. Well, they were supposedly made out of two "163" intakes. I personally saw the one everyone was claiming was made that way. It looked and measured exactly the same as the "163" intake we ran at the time, and still have. And the "359" intake is better. The thing is, Ed, the intake isn't the restriction. You can put a high dollar Super Stock intake on a Stock 427/425, and it won't pick up 0.05. Been there, done that, the intake I have came from a real fast Super Stock car. And none of the guys who sometimes run Super Stock with a Stock 427/425 car swap intakes when running Super Stock. Because it doesn't help. The whole thing is just another bunch of smoke and mirrors, created to deflect attention from another make and model of car.