Cam eccentric on 340

Anyone can make a mistake. What would scare me is the BS line !
Trust ?
I saw on social media or Youtube a situation where a guy had a late model Ford truck that would vibrate severely above 65 mph. The dealership said there was nothing to be done about it. The Service Writer told the customer, "that model of Ford truck was not designed to go over 65 mph."

If I can find it again, I'll post a link.