Decided to make a better head adapter for my flow bench. It is 24” long in order to better support a variety of cylinder heads, such as a longer straight 6 cylinder head. It also has removable o-ringed cylinder bore sleeves so I can easily change them depending upon what I may be working on. If I end up using it more, I can later modify the adapter with an indexed slider for quick repositioning of the head, depending upon which cylinder ports I am working on.