well GTR re-inforcement bars are quite different
http://img.photobucket.com/albums/v24/V5MA.../Picture006.jpg <- pic gtr front end (note it even has holes for n1 vents which also make it even more weaker)
by cutting the lower part of the gtst front reos, your ultimately making into the shape of a gtr one, i will admit however, the gtr intercoolers are tucked in abit more closer due to the obvious fact that factory design of the gtr front cooler is better than the aftermarket install of most kits going around.
with abit of custom work you can reduce the amount that you need to cut but people dont cut their reo bars for fun, its obviously the only way to do it given the size of intercooler being fitted.
dont be afraid, just do it, some cars dont even come with reo bars from factory, eg s14's