Vacuum Secondary Conversion

Sorry, i will post a link next time. Whenever I try screen shots, they tend to come out blurry.
Unless some company starts producing modern cast iron sbm heads, I doubt I would ever build with iron now except for a basically stock rebuild.
I have no doubt people are building 11.5 cr iron headed street motors, but not sure if that is a function of cam events and SCR.
If you have a build that you have done that used iron heads and 195-200 psi on pump gas, I would love to see those specs and run it through wallace every which way.
Anyway, like I said, I don't want to hijack the op's thread