If you are more interested in riding and having the bike run as well as it did stock, then scare up the proper stock parts for it. "Restoring", to me, implies that is the preferred route.
If you want an ongoing tinker project, then see if the carbs can be mechanically fitted to the bike, get it running and do repeated testing to tailor the jetting to fit your engine, induction, and exhaust. You'll probably need to adapt a choke cable and custom throttle cable, too.
I suspect the carbs aren't on the bike now because of the learning curve and tinkering needed to get them to work well on this bike.
I'm sure it can be done, depends on the effort and learning you want to do. No one will know your bike better than you when you are all done.
Cheers,
