XU5 to XUD Air Con Swap

[evilally]

I have recently acquired a 405 with an XU5 engine and icy cold air conditioning. I'll be installing an XUD lump soon, and would like to keep the AC as it seems to be working so well. I'm hoping that as they are both XU series it should be possible and hopefully not too much of a headache? The XUD never had AC originally so one thing that springs to mind is I'll need to get the correct sump with the mountings for the compressor?