There are 16 submodels of KX-165 when you factor in:
14 v 28v
720 or 760 comm channels
25 or 50kHz selectivity
Integrated Glideslope Receiver
Unfortunately, the model he posted doesn't have an integrated glideslope receiver. There is NO provision to connect an external glideslope receiver to the KX-165.
You can't get GLIDESLOPE with this unit no matter what.