Well, that's nowhere near where I was going. He has valid points. There ARE instances where the rocker shaft is in the correct spot for a given application. If it doesn't need relocating, there's no reason to do it. That said, the more an engine's modified with different valves, heads, pushrods, reground camshafts.....and anything that might affect rocker geometry, the higher the chance is to need relocation. In the case of my slant 6, I used 318 valves that are .300" longer than the slant 6 valves. I wanted that extra length in order to be able to put more valve spring in. So naturally, I needed the relocation kit. I was simply advocating checking everything and getting it right and there's nothing wrong with that.