You made a reference in picking the CNC SM heads over the 596 s and I guess what I was asking is what was your thoughts over the unported SM heads over the 596's?
Obviously......only one way to know for sure.
And, it would depend on what they were tested on.
However, with reference to a 500+hp stroker........ intuitively I feel it would just be a typical “good/better/best” scenario........ with the major variable being exactly how good the ported 596’s are.
If it was a set of real “ported” 596’s, they could easily be better than the ootb unported SM heads....... in which case the “good” vs “better” test might not play out as hoped.
Though, that’s not a likely scenario for a targeted 500+hp build with typical “home ported” 596’s.
If I were building it, neither version of the SM heads would get used “ootb”, which would tip the scales more in their favor.