Well with some adapting, it can be used - the 36mm roundslide Mikuni is more often the carb of choice.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1262724030You will most likely need a new flange for the cylinder/carb mount, a new throttle cable made specifically for your throttle and this carb, and you will have to either adapt the carb to the stock air cleaner - or find an air cleaner that works. Jetting for the big single could be far different that what is in the carb for running one side of a twin.....the carb will have more than twice the air flowing through than it used to. The slide has an effect on the way the carb meters fuel/air, and the slide, needle and air jets that are in the carb may not be the correct ones to allow the carb to work well on the Savage.