Quote:
Originally Posted by 63gmc4x4
your probably right, but what is the point of the larger free flowing intake manifold if it blocked by 1/2 inch hanging in gasket material from the smaller gaskets
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They do not block anything,they are the same size. I have a 401M motor and 3 305s. The head ports are the same on the 401M,the only difference is the design of the 401 intake and the port for two cylinders are combined 305 Gaskets will work perfectly and not block anything. Dave