I know that Michael's valvetrain geometry correction "proposal" can be "controversial" but I am fully on board with his explanation, the reasons why there are inherent problems with proper geometry, and that it involves more than clearance and "good valve stem scrub".
I have very little personal experience with this arena, but I have the ability to use critical thinking, and I deal with problem solving every day in my work.
I paid "the extra" not only for the correction kit that was made for my application (cam specs were required, along with the kind of heads I am using) but for the T&D roller rockers, which I could have purchased either similar or possibly identical rockers, but my understanding based on asking several times and in different ways, these rockers are made specifically for B3E for the way he puts it all together.
Regardless of the minutiae, I am confident that my valvetrain will be setup to the pinnacle of perfection, and that means maximum performance and longevity, and likely will also result in little need for lash adjustments.