Voyagers were built by JPL and not contracted out so align to a degree with the spacex model. In part this was because budget got cut badly.
“In order to reduce costs and overheads, NASA decided to leave design and construction of the Mariner Jupiter-Saturn spacecraft to JPL, rather than to Boeing, General Electric, Hughes, Martin Marietta, and North American Rockwell, all of which had some level of preparation for a Grand Tour proposal. The largest aerospace firms lobbied NASA Headquarters and Congress for the contracts. In order for expensive projects to pass congressional scrutiny as part of the NASA budget, they often had to include an intention to contract out much of the work” voyager - Andrew J. Butrica
I think they also did build a test spacecraft ?
Anyways the approach (smaller focused team) contrasts with the big SLS type projects that are contracted out for political reasons.
“In order to reduce costs and overheads, NASA decided to leave design and construction of the Mariner Jupiter-Saturn spacecraft to JPL, rather than to Boeing, General Electric, Hughes, Martin Marietta, and North American Rockwell, all of which had some level of preparation for a Grand Tour proposal. The largest aerospace firms lobbied NASA Headquarters and Congress for the contracts. In order for expensive projects to pass congressional scrutiny as part of the NASA budget, they often had to include an intention to contract out much of the work” voyager - Andrew J. Butrica
I think they also did build a test spacecraft ?
Anyways the approach (smaller focused team) contrasts with the big SLS type projects that are contracted out for political reasons.