Need a little carb ID help.

I need to find a good card rebuild kit for cheap on eBay I am seeing kits for 77-8? and I am not sure which card would be the same as my '75.
The Engine number is K4E043195. I used another engine I had bought from the person that sold me the '75 kz400. So yeah, I need to know what carbs come with that particular motor and which rebuild kits will work for me. Thank you all in advance. this forum has been cool to me in the past so yeah. take her easy peeps

Not familiar with the 400s but there is a lot of good technical information at www.kz400.com/index.html