I’m happy to let you guys get aaaaaaaallll the manifold porting........ especially the stock iron ones.

My suspicion is that most of what’s been done with these 301 intakes would end up making similar power(with the exception of the JS piece).
Unless you happen to come up with something substantially better, I think it might be pretty hard to quantify the differences when the measuring tool is a 3500lb car running on tires with limited traction....... in different weather conditions....... at different tracks.
And let’s not forget the restrictive exhaust manifolds added to the mix.

Some little tweak that could be worth 3-5hp just gets lost in all the variables.