Yes Waveski, that is a block-off for the choke well on the passenger side of the manifold. Over the years there have been a number of ways to heat the choke so it will open as the engine warms, that open well was used for some applications. I thought in one of your prior pictures it showed an electric choke on your carburetor.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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