72 Demon A/C conrol panel removal advice?

Thank you it is pretty presentable old thing I suppose!
Ah I see. So once these two nuts are removed the unit can be drawn forward and progressively disconnected as you start to see things.
Is there perhaps any benefit in unscrewing the gauge cluster to gain access to the far screw?

I must admit I'm a little bit paranoid about damaging anything on this car from the point of view of sourcing spares. I've never seen another here in the UK. Or, indeed, any other A body for that matter!