It looks like a '70/'71 B-body (& GP?) short single snorkel housing as it has the small hole for the round vent stack on '70 Calif. cars and then '71 all-states. The chrome lid may have come with the 455HO on the B-bodies (North would know for sure) and I believe the filter is the old AC 212 number (like for the GTO's).
My '71 Bonneville came with the same air cleaner except with a black painted lid.
Oh, 1968 intake manifold, btw.
Dennis
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