You can chase that idea, or better look at the games and train accordingly. As big as crossfit is and all the info out there I can't assume this is a real question. So no is the answer, if you could the role of high level coaches within that community would not be needed, those are great athletes. It's an insult to assume you could shortcut the process with just a kb. Unless you formerly Olympic lifted, how can you think a kb snatch would ever transfer to a heavy barbell snatch, it's not even close to the same no matter what you've heard. All that said, it's a great goal and to even think you can make it shows your a bad a#@, I'm sure with the right coach or direction you could do it. Of your an audio person check out barbell shrugged podcast, great info all crossfit and legit advice, s***, send the same questions. Best of luck.