You could pick up a used tank off any softail of the same year that is not a rocker or deuce for fairly cheap and put a black line dash

 

My fear of that is that the from doing some research, the Deuce apparently has a longer neck on the frame to accommodate the tank. I'd end up having frame just hanging out there.

I found a speedo/tach that fits in the riser clamp, so I want to get rid of the factory speedometer.