The old joke is salesmen wear name tags so they can remember their own names.. That said........
When I got my brand new Class A the Salesman told me it would have a Ford Engine and an Allison Transmission.. What he did not know is I'm NOT a Ford fan.. he later told me he did think that was kind of strange (Allison Trannies do not fit well on ford engines, they fit GM engines, and a host of others, but Ford has a different bolt hole pattern)
I got a 8.1L GM engine (Which I like better by the way).
The point is. The "Ford" was a mistake, Not by any means fraud on the dealer's part.
Which is why I say talk to the dealer, It may have been a simple mistake, it may have been fraud but the fraud may have been BEFORE the dealer took possession of the unit.