Mine is a 9/'76 and has factory a/c but no bottle. 

My 280...

 

Interesting.  Where does this hose go to?  That's the one that would go to the bottle.

1 hour ago, Zed Head said:

Interesting.  Where does this hose go to?  That's the one that would go to the bottle.

It goes to the bottle I've never paid attention to.

Paying attention is like having bullets in a gun. I missed that one though. Damned if I'm not getting old.

2 hours ago, Zed Head said:

Interesting.  Where does this hose go to?  That's the one that would go to the bottle.

From manifold it goes to the check value (mounted under the two magnetic valves) and from there to the bottle.

Edited March 1Mar 1 by MH77280Z

Mystery Solved!!

20 hours ago, siteunseen said:

My early '77 doesn't have that bottle, just the charcoal cannister. Anybody Anyone know what year they started using those bottles?

@Zed Head the cross out text isn't the same as strikethrough? 

1974