I love this subject.
Around here, any time your typical hick is selling a Mustang, it's always a "306 with a small cam" and their knowledge of cams is typically limited to the Ford Alphabet cams, so they say "it's a small cam, it doesn't lope very much, i think it's a B cam" which i laugh my ass off at because the B lopes almost as hard as an X303 does.