I am convinced that the city name (actually it's a village) is Pluchow as I checked on the Ellis Islands papers and described above.
So for me the case is closed :)
Below evidences: (from the second scan I recognised yet that the Antoni's father name is Jan Grzeszczynski, so the surname is also misspelled).
Gruszczyński is quite popular name in Poland - more than 4600 people have it here, check the map in the link below:
moikrewni.pl/mapa/kompletny/gruszczy%25C5%2584ski.html