physically, any year Conni can supply the carbs you want. The minor floatbowl difference with the drain screw is moot. It will fit any kehein in the series of years. The Main jetting did differ, cali ones were a bit Fat, and though this sounds opposit of what it should be, they thought it would provide for faster warmup, and less wasted fuel.
Euro slide cover plastic caps had a longer extended "stop" that restricted the slides rise, and thus restricted top end h/p also.
jetting, bodies, fitup, use, and function, are otherwise interchangable.
as for bikes other than the conni you can use.....we can go into the 900/1000/1000r ninja carbs ad-nauseum, 32/34/36mm, and play this out, but there are sooooooooooo many Conni carbs available, stick to them.
it's easier.