400 Non Stroker Build

It would probably be a plus but I also possibly see it as an expenditure not worth much power vs cost spent. In other words, I’d do it if it fit the build.

Meep in mind that a valve upgrade by itself is t all the head should receive. The area right under the valve would need work to make the most of the increased valve size. Otherwise, the flow gain is small. When you port the pocket accordingly, the gains will be significantly better.