I'm not so sure it's an A12 intake. As mentioned the "6" was different (but did not look like the 6 pictured, they were slightly tipped on thier sides) and the CH6B was not on them, however if you look closely it appears that intake has been polished some on the runners, maybe the CH6B was removed?

The intake shown here is one I owned, it was an early over the counter replacement, notice the shape of the 6 and the presence of the CH6B.