Look around the Show off Your Project forum and you'll find something decidedly interesting. Most people don't have the actual computer in the dash. The screen is in the dash, mind you, but the computer is under a seat, in the trunk, in the glove box or center console, or some other out-of-the-way location.Originally Posted by nightrid3r
And there are in-dash single-DIN screens that will meet your needs exactly.
That said, if you've got a bracket for a fare meter, you can use one of the many mini-ITX cases out there, with appropriate hardware, and mount it to that. That would, however, put your computer in plain view to a potential thief. That's not a good thing.