There is now an option in the dropbox to get either the "Standard Stack Top" or "Off-Set Right" Stack Top. The "Offset Right" tops are designed to shift both units to the right 2 inches allowing for better control of the Trolling Motor Cables, especially the Garmin Force TM and Lowrance Ghost TM large cables.
These will fit any Dual Stack mount from BBT.
BBT would also Highly recommend Our HD Gimbal brackets for your units. The rule of Thumb is to get a "Shorty" bracket for the bottom position and regular height for the Top Position.
This will help even up the screen faces to be more even, get them here - HD Gimbal Brackets
FOR MORE INFORMATION ON THE "HOOD" STYLE BOW MOUNT - PLEASE CLICK HERE.