Yeah I probably would...
And by doing so I would learn how it works and how to fix it, usually..
Actually I'wouldnt buy a rolex, I'd get a Japanese copy of a rolex, Just like my Japanese copies of Gibson Guitars (by Ibanez) and My Japanese copy of a porsche/e-type/ferrari (by Datsun) , which I have taken all apart with no formal mechanical training. But I'm good at that sort of thing, and have done it to other cars before.
With the proper manual, you should be able to put them back together. You might need to get somone else to tune them though. Some times you just have to know when to leave it to the experts. Like I do with gearboxes.
Good luck with it.
Solex Carbs were a pretty common swap in Japan. They were fitted to 240Z rally cars, and the Z432R, Skyline GTR probably had them too, and lots of roadsters have them bolted on their U20's. Dont know for sure, but I'm guessing they were available through nissan motorsport.