I found several articles in an early '68 "News From Pontiac", a publication with news stories from around the country about Pontiac vehicles. The articles announce the tire pump option. None are clear engine shots but I cannot see that DT128 in any of them. Here is one. You can somewhat see the known label about the air cleaner but no other one (which should be brighter and bolder).
Last edited by Jimc2002; 02/09/1807:10 PM. Reason: Replace dead link.
