You answered my question greatly thank you, but I think I left out part of my question that’s the most important. Most of the time when people are building an engine, it usually needs bored do to normal wear. Or sometimes it needs bored for the stroke. So if we’re boring the engine and changing the stroke on a small block, I’ll just stick to small blocks because they have the same deck hight. Does it matter what you start with? I think is the real question this thread is about.