This gets the adjuster straight in line with the valve stem. Now the adjuster rides way up on its edge, also increasing valve lift. I would also go so far as to grind the rocker arm surface that faced the valve. This way I could back the adjuster off even more, allowing me to use even longer pushrods. All this was a lot of work for numerous small gains that could make the difference in tight race class.
Most vee racers know who builds hot engines and what it really cost to build one up.
The cylinder heads are a topic that need an article by themself Gene Bergs article on heads is well worth checking out. This article is dedicated to the memory Bill Murdock who lost his fight with cancer this past summer. He spent many hours translating my thoughts to the finished products you have seen my name on.