[SSDiv6]

Originally Posted by Bob

I would agree that they do not have them all, but they have the popular ones. And I would agree that some were drawn on, at that time, bogus heads.

So, by your own admission, SS spec's (for the most part) are to big to use for a stock head---Correct?
Some are, others are not. Some heads that have big numbers, will slow down the car in a Stock application; on others will pick up, and on others, there will be be any change. I know of some of the shown SS spec volume numbers that are actual OEM stock numbers that will not have any effect in a Stock application. There are also more variables that would dictate performance such as engine size, type of induction, manifold style and cam lift.

So when a 283 head pours 10% more than the SS spec, how do you defend that? How can you justify that big of a runner? Surely, you don't expect me to buy into the new valve rule as being the cause?
I will not speculate on this particular case since I was not there and I do not know the whole story. Nevertheless, if the port was 10% larger than the SS spec, I would agree it was more than valves and plain stupidity.