Can't answer the first part, but the Nikon PC-E has enough room for it to fit, just not sure if the aperture will work.
But, as Steve, mentioned, if you are coming from the Canon, TS-EII 24mm, I think you will be disappointed, at least I was. I shot the TS-E 24mm II and 17 for the last few years I worked with Canon, and they are by far the best shift/tilt lenses for 35mm I have seen. The Nikkor 24mm on the other hand is weak on shifts and by default is like the original Canon TS-E lenses where the shift and tilt are in a different plane. You can get Nikon to switch this. But optically the 24 Nikkon is just not up to the resolution of the D810. You may find a good example out there as some claim the lens is good, I tried 3 different versions and all were soft on shifts. Way too much $$ for the optics. Nikon is looooong overdue on new glass in this segment.
The 45mm PC-E is a better lens, I owned it briefly, but the focal length is one I never really use much. It still has a lot of CA (correctable) but was stronger on shifts. Still on a older and less modern platform than Canon.
Paul C