Yes. *Just* below the headliner. Mounted on a small Ram mount hanging down from the mirror base. The base unit will go under the driver's seat, or perhaps behind a side panel. I have room there too.
The suction cup mount is a possibility (Ram mount makes those too), but I really want something more solid and out of the field of vision, yet visible. Hence, the Ram mount. http://www.gpscity.com/search-a+ball+size