> the first stage of the [Minotaur IV] was manufactured in 1966.

Was it? Minotaurs repurposed components of Peacekeeper missiles. Development of the SR118 first stage motor—reused as the first stage on Minotaur IV—didn’t start until 1978. [1, pg16]

[1]: https://ntrs.nasa.gov/api/citations/20120016230/downloads/20...