If that adapter works (= if it fits on both cameras) then yes, you can use it and of course you'll have to remove the groundglass (edit: not viewfinder of course).
However - I highly doubt that the adapter will fit your Rochester camera, they were made for dry plates and not the 'modern' 4x5 sheet film holders - which the adapter will be built for. Therefore you'll have to make some serious modifications on that camera.
Unfortunately the movements will be very limited due to the fact that the film/sensor is behind the mirror-shaft (or mirror-box, whatever you call the space where the mirror is and moves). So, if you move the camera too much, the light will quickly be blocked from the sides.
Apart from that you probably won't get the best image quality out of it, those plate cameras have interesting optics, but I don't know how well they'll perform under the scrutiny of a smaller sensor/film area - after all the lenses were meant to cover an area of 50.8 cm^2 and you're only using 27cm^2. That's about 50% and that's quite a heavy crop and I doubt the optics will lead to satisfying results...
That being said it may turn out to be a nice project, at least for photos in a pictorialist stlye.
