Here is the prj file for Nad27 / Californ ia Zone II
PROJCS["NAD27 / California zone II",GEOGCS["NAD27",DATUM["North American Datum 1927",SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],TOWGS84[-10,158,187,0,0,0,0],AUTHORITY["EPSG","6267"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9102"]],AUTHORITY["EPSG","4267"]],PROJECTION["Lambert_Conformal_Conic_2SP",AUTHORITY["EPSG","9802"]],PARAMETER["latitude_of_origin",37.6666666666667],PARAMETER["central_meridian",-122],PARAMETER["standard_parallel_1",39.8333333333333],PARAMETER["standard_parallel_2",38.3333333333333],PARAMETER["false_easting",2000000],PARAMETER["false_northing",0],UNIT["US survey foot",0.3048006096012192,AUTHORITY["EPSG","9003"]],AUTHORITY["EPSG","26742"]]
The change in Z values is due mainly to shift from Clarke1866 to WGS84 elipsoid of -10 m in X, 158 meters in Y and 187 meters in Z (see TOWGS84 record....