crankcase breather tube

Does anybody remember an article, not really an article, more of a 'gee whiz' page. but it showed how a guy found a grommet that would fit in the crankcase breather tube hole in the back of intake manifolds on early Chevy small blocks. It made it so that he put pcv valve in it. It was pretty slick. It had the part number for the grommet, but I can't find it in all my stuff and would appreciate anyone helping me out. I'm about burned out trying to engineer a fix for the situation. Pat