From that view it looks like there is an egr plate and valve sandwiched between the carb and the manifold.
The 2-1/2 inch round cylinder shape that you can see is the vacuum diaphram for it.
These cars were exempt from that type of equipment new but that doesn't make them exempt from passing emissions testing in some states. In my experience that is impossible without installing smog, but this must be a CA car.
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