Yup, I got that. The gasket bore has to be at least as big as the cylinder bote or it overhangs. Now with talking a 4.180" gasket bore you must be talking BBM. If you use the 4.180" gasket to scribe your limits for an engine with a 4.120" bore, you can have a 0.060" lip to catch the incoming air/fuel. This will cause a restriction which damages flow into the cylinder.
You need not be insulting with that cement head road apples stuff!