Dealer swap. The car's 150 plus miles away. Should I be concerned?

That rankles; I would put it on the con side of a pro/con list. As in, "what else may they be foisting on me".

I'd wait, if possible.

 

I geo-located my swapped RAV4 VIN here, before the local management told their salescritter where they were getting it from:

Toyota Inventory | New Toyota Inventory Search

... though that Google spreadsheet someone posted earlier, is much more detailed.

I think you need to adjust that for modern inflation.

Just ask the particle physicists, they've been weighing (or more properly, "massing") it almost since they discovered it generations ago. But just recently, they also "weighed" some and verified that its mass polarity is also identical to ordinary matter.

 

You have a contract for the car you want at the price to which you agreed. You might want to just wait.

I've had two Toyotas delivered to my home by out of state dealers for a fee. I had no issue with either car, but for one of them, the porter lost his way and didn't get to my home until 9PM. Tough to really inspect a car in the dark. On that one, I also had to explain to the porter which docs he needed to get back to the dealer in Illinois.

 

Definitely be prepared to walk away from the deal if there's something wrong.

I ordered a new car once, from one dealer. They closed, there was a strike at the factory, then the dealer that serviced the order tried to renegotiate on the deal made by the original dealer. It's one of the biggest mistakes of my life not walking away from that one.