I think I found two of the men in the Ellis Island database:
Name Residence Age Birth Year (approx.) Arrival Year
Prusaczek, Walenty Piaseczni, Russia 20 1893 1913
Prusaczik, Stanislaw Piazeczno, Russia 18 1889 1907
Walenty was travelling to his brother Josef Prusaczek in Pittsburg, PA. His father is Andrzej in Piaseczni Lonza (?). Stanislaw was travelling to brother Josef Prusaczek in PA, too.
There's much more info on the manifests (Note: TWO pages for each man -- you need to move back and forth within the pages.)