Change in plans. Another new build begins

Excuse the messy paint job. After I built this flowbench I primered it and then tested it and I was off and running and never stopped to paint it. One of these days. This is my third bench and I built it exactly how I wanted it. 8 motors and I can flow most Heads up to around 36 depression if I am looking for an issue
You know I can put my own short block together, assemble a whole running motor, build and modify with custom machining my own trans, set up my own ring and pinion etc etc, but somehow all the years I been working on cars and building motors I never learned a thing about cylinder heads and how they work.
I envy you. How did you learn how to do this. Where did it begin for you that you got to the point that you even built your own flow bench.