They do look nice and show up with mostly Pontiac numbers.
The left side shows up as:
9777646 T/8 400 H.O. or Ram Air MANIFOLD 1967
9777642 doesn't show up, but 9777641 does as the RH side, so I'd guess maybe it was a replacement part for a cracked manifold?
That said, I'd guess they are repros based on how thick the casting look.
Last edited by SD73; 06-29-2022 at 11:37 AM.
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