When you have GIS data in UTM and in a particular datum say new ARC 1960, its possible to convert it to a kmz/kml file then load it in Google Earth. What errors occur when displaying the data? Is there any research article in this area available?
It is possible to convert the GIS data to any required datum in ArcGIS software, there itself you can convert to kmz/kml file format. After your conversion you can see the data in Google Earth.