Model type? which carb kit?

Ok so trying to figure out which carb kit I need to by for my 1980(what the title says) yamaha xs400 special (had special badging on the airbox cover panels originally).... I found some pretty cheap from partsnmore.com... but which one, is it the G model? Also, under the carb holders there is no G model but they do have an XS400S? https://www.partsnmore.com/cat_index.php?mo...p;category=carb