Carb rebuild?

[gtmud]

I am working on an 86' CJ-7, looking to rebuild the carb but am finding that its hard to locate a kit. The parts store say that it should be a Carter, but the carb has a "W" stamped on the side. That means Weber right? the only other #'s I could pull from the side of it were 0- 273. The rebuild tag has 8334-S & K510-A below it. Do any of these #'s work for an actual part #'s . Any help would be greatly appreciated. Oh, and one more thing, what the heck is that micro switch on the carb do. It seems to be made at WOT.?