There is a connection on the intake manifold, a crankcase breather connection with a steel tubing on it, a connection on the oil filler, 2 connections on the distributor, and 2 connections on the fuel pump; and I understand there is supposed to be a metering valve somewhere. I have 2 manuals for the m37, but they do not show how all those connections tie together. Plus, I have not even put the carb air breather stuff on yet. thanks