Yes, as much as I understand it. You have to either make a van that's specifically tailored to performing bank robberies (a door-smashing attachment at the front, a pulley to quickly get the safe box inside, etc), or at least advertise it as such ("Will get you from the robbery site faster than police can react!"). Otherwise, it's just a van. Owning a van, or selling a van, is not illegal because it could also be used to break law. (One's hands can be used to break law, but this does not lead to a liability for merely possessing hands.)