My source for the Saturn V information is Jay Windley, a mechanical engineer and Apollo historian. Jay is as knowledgeable about the Apollo program as anyone I’ve ever encountered. His main thing is combating the alleged “moon-landing hoaxâ€, which he does with his Web site
clavius.org and by participating in several Web forums. He is also a registered member here though he doesn’t post often.
Jay has mentioned the Saturn V thing several times, including
this thread at the Apollohoax forum. Here is one of Jay’s (JayUtah) quotes:
There is a conspiracy there, of sorts.
The Saturn V was specifically dumped in favor of the space shuttle. The Saturn V was seen as mainstream technology, albeit the pinnacle of it. The shuttle was seen as a departure from convention and therefore risky. The shuttle contractors were obviously worried about competing with the Saturn V. So for confidence reasons, as well as budgetary reasons, the Saturn V program was terminated. And I mean terminated. The plans were archived and the tooling was ordered dismantled. This was to send a signal to the shuttle contractors that NASA wouldn't "secretly" maintain production of the Saturn V. About half of Apollo's budget was for Saturn V development. This was sold to Congress on the presumption that it would be the heavy-lift booster family even after Apollo. So you can imagine how reluctant Congress was to approve "yet another" entire launch vehicle family just ten years after approving the Mother of All Rockets.
If you think this is wrong perhaps I should PM Jay at Apollohoax and ask him to come here to discuss it.
Edit to add:
I just sent Jay a private message so hopefully he'll be joining the discussion. I'm heading out of town for the next couple days so I won't be participating again until Sunday at the earliest.