Well, I finally traded the venerable Chrysler Aspen for a 2014 Ford Explorer Limited. Fortunately, the 7100 installed in the Explorer without any difficulties. I actually found more room under the seat for the radio body and all related wires and accessories. Running the cables to the control head was no problem, and the control head fit like a glove in the small front compartment in the console. The set up is exactly the same as I had in the Aspen and is working perfectly so far.
Here’s a photo of the control head in place. Note that I have not secured it in any way as the snug fit holds it firmly in place.