Both my mom's house and my house, each circa 1960, have older outlet boxes that are too shallow for a standard GFCI. The boxes have the top and bottom that go in a little over an inch and then have a 45 degree slope section down to the back, which is probably less than two inches high (don't have one in front of me here...) A standard GFCI hits the sloped sections and stops the standard GFCI from going all the way in, so it stands out about 3/16th of an inch. Does anyone know of a GFCI outlet that can fit these older outlets? I asked at my usual electrical supply house and they just sort of shrugged. I would prefer not having to tear the wall up to remove and replace these old boxes. And, yeah, I realize that they are probably undersized by current code, but they are on 15 amp circuits and I assume they are grandfathered in if I can find a GFCI that will fit. On a different circuit, I put in a GFCI breaker in the panel but I would prefer to put them in the wall so I don't have to go outside to reset them when they are tripped.