The switch is different, it has vacuum controls for the dampers, also 4 fan speeds, the WB one is different to the HJ one too, it is a vertical mount one on the left side of the steering wheel whereas the HJ is on the right, the old R12 gas that was used is now illegal but you can get your system retro fitted for a newer gas, can't remember which one is used now, best bet would be have a chat to a proper auto a/c mechanic.

Cheers Mark