Sequence number

Does anyone know the sequence number they started on making 289’s in 68?

Have you contacted Phil Parcells? Phil manages the National Database on http://www.CougarClub.org, his contact information is also listed on the clubs website

It would depend on the plant…they were placed into production in January/February 1968, and the Mustang and Cougar Tag Book would provide sequence ranges for each plant that could answer your question.