You need to go back and re-read the article, that info is not from hughes that is the opinion of Chris Holley for mopar connection. This pic is directly from hughes website and clearly shows a double roller. Why don't you actually call hughes rather than try to find web articles to support your opinion.
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https://www.hughesengines.com/Index...VGltaW5nIENoYWluICYgQ29tcG9uZW50&partid=27143
Funny they even mention "race engines" in the listing.