OK, forgetting about the panel dock for the moment, wiring a connector
and fuse for ship's power is an A&P sign-off isn't it? Same for
securing extension wires behind the panel with both ends left out for
access but not connected to anything on the aircraft electrical system.
If I went with a RAM mount, if it is a suction cup or clamp mount then
nothing is needed for the mount itself. If it is screwed to the
airframe, then its an A&P sign-off, right? Nothing here that goes to a
FSDO or needs a 337, I'm pretty sure. Someone jump in and correct me if
wrong.

So it seems the real issue is whether the panel dock itself requires a
337, since it seems none of the rest does if the GPS is put on a RAM
mount. Frankly, I don't see where a case could be made that the panel
dock needs a 337 when a ram mount doesn't, but then this is the FAA we
are talking about.

So the other thing was pulling out the Foster Loran. Does removal of
avionic equipment require an avionics shop, or can that be done by an A&P?