Piecing together an A/C system

The Frigoclic actually have two types of fittings: the "field repair" oeticker clamps and the crimper type (which I want to use - the local hydraulic supply store should be able to crimp them for me). As far as I understand their barrier hoses are all reduced diameter.

Any suggestions for a (type of) dryer or are they all pretty much the same?

What about compressor orientation? Should the connections point up or does it even matter? I would assume it doesn't really matter much.
I want to mount the compressor on the passenger side below the alternator and the hoses would exit towards the inner fender.