If you install an Alpine unit for instance, (I can highly recommend the Alp CDE9850Ri) Audioleads do a kit to enable the stalk to control the unit.
The basic kit is a PC99-X12 and then you need the adaptor for the type of H/U you are installing.
PC99-ALP for Alpine
PC99-BLA for Blaupunkt
etc...
You will need to remove the dash top to install this but that’s straightforward and well documented on this board. Audioleads also include information on how to do this, in the kit.
The display becomes redundant.