My buddy, Kelvin, is working away on his 510 wagon. It's his 3rd 510, first time with a wagon. It's far from finished, but you'll get an idea of where he's going with it.
His other 510s are here: http://www.datsun510.com/photopost/showgallery.php?cat=500&ppuser=9&sl=k
Makes me miss my 510s a little bit, but I'm stoked to be getting closer to getting my Z done. http://www.datsun510.com/photopost/showgallery.php?cat=500&ppuser=49