i was able to mount a full sized rear blackburn rack i got for cheap as a front rack by drilling one extra hole on the metal stabilizer plate. i've done lots of long tours and i like the full sized front rack. i'm able to carry two additional panniers up front, or my two person tent or other combinations of loads.
look for a rack that connects with a single "L" bracket through the fork front brake bridge hole - not the ones with two connecting arms. i updated the existing bolt and nut that connects the front fender with a slightly longer one. the front fender connector is fed on from the rear of the fork and the rack L bracket from the front. i used an extra nut to space out the L bracket to clear the bottom headset cup. i drilled one additional hole into the L bracket so there would be two bolts connecting the rack to the L bracket. that's it.
i'll try to post a detail of the connection one of these days...
miyata 610 by
brooklyn_bike, on Flickr