you don't need to change the bushings to "make it work", the bushings are just usually changed along with the shifter cause they tighten everything up and give you crisper shifts.
buy this. http://www.ebay.com/itm/95-01-SUBARU...f264d9&vxp=mtr
i have it, and also owned a kartboy before and its the exact same shifter. only difference is the $75 price difference. get kartboy bushings, though.