Where manifold bolts to tractor is gasket only. There is no gasket under the unit, just metal to metal. You will not need a gasket unless you take the bottom plate off the touch control. If you do that, ge6t a gasket, rather than form a gasket. I tiny spec of the form a gasket getting inside the system can easily cause a complete rebuild.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry