I have B6s on my 1965 ES-330 and my '90s Japanese Casino.
This leaves you with a very shallow break angle over the bridge or, if the neck set on your guitar is on the shallow side, there's a chance it may not work at all.
The B3 and B6 are worth considerimg for a Casino but they're designed for guitars with traditional archtop bridges as you might find on a Gretsch, rather than the 335 style bridge that sits much closer to the body of the guitar.
