What year is your car? I don't believe the filter to breather deal came out FEDERALLY until about 67 and may have been 68. This may have been earlier in CA sold cars
But the breather hookup is correct for later cars and certainly will not hurt older cars, and may have been required "upgrade" IE smog inspection for states like CA
Here's the artist rendition out of the 66 manual. You can see "according to this" that it was not there in 66
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