300 exhaust manifold

LKauf

New User
I have to replace the manifold on my 300. Can some one explain why the exhaust/intake manifold on the 300 and other Farmalls have only 6 openings into the head. There is only 2 intake tubes going to the head and 4 exhaust runners. Is there a connection in the cylinder head that connects the runners to #2 and 3 cylinders over to the 1 and 4 cylinder for intake??
 
You figured it out!

The intake ports for the front (#1 and #2) and rear (#3 and #4) cylinders are "siamesed" inside the head. Thus only two branches on the inlet side of the manifold.
 

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