I'm sure there is, just not recorded online purely for bragging rights! Considering there isn't any real Z31 enthusiasts in Australia online with the exception of maybe two or three that I know of, it's no real suprise that there isn't more of us out there recording times to be published on the web.
Stock? Running 12lbs maybe a low 14 with a good launch. Not difficult to break 13s though and with some basic mods 12's aren't difficult. Takes a bit of work to hit 11's and lower though... Z31 drag list, http://z31.com/misc/1320/