This factory photo of a 1966 "YS" engine has the tag like the one I submitted at the start of this thread attached to the top of the trolley.
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Bill Nawrot (Wino Bill)
1972 GTO Hdtp One Owner, GTOAA "Concours Best Original" 2007, 2013, and 2019
Auto-Biography http://oneownercollectorcar.com/inde...to-bill-nawrot
HPP Sept. 2014
https://www.hotrod.com/articles/1972...-gee-no-g-t-o/
YouTube MCACN 2014
http://youtu.be/1IPQVPevbxU
1967 GTO Conv