Here is a picture from the last page of the artical. It has the air cleaner on and there is NO N95 vent going to the breather. I'm listing all the pages to the Magazine. Anyone car read it for them selfs.
Just download the pages and enlarge them and they will be readable. I know I'm not going to make those that believe the vent tube was left open think otherwise. As far as I'm conserned it wasn't and to me this artical and the Super Stock magazine of July 1970 both shows the vent going to the a 2 nipple breather.
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