Originally Posted by
rboltz
They were on either side but mostly on the passenger side. Usually it was the RT-246 which is the remote version of the RT-524. The control head was then in the cab to change channels, etc. I have also seen the 524 mounted on a bracket above the battery box but that was a "field" modification so the passenger could change channels. You will find unmodified 715's, like mine was when received, that have the holes on the passenger side seats and on the curb side of the bed for the antenna mount.
Prior to the RT series, most trucks had the older GRC/VRC series of radios mounted on the drivers side. Those also could have a remote but only for switching between radio 1 or 2 or radio 1 and the aux. receiver. Channel changes had to be made on the radio itself.