The reply to your edit with the additional question about the sway bar:

Keep in mind that when you retrofit the complete, except for the strut bearing mounts, late model suspension into the early car you have the whole design as it originally fuctions and there should be no problems at all (when it is left stock).

It is the addition of the 944 spindles that affect camber and the lowering of the car that affects both caster and camber.

The problem you mention about the sway bar and control arms is due to lowering and has affected the caster. There is a special sway bar bushing by Topline Parts made for this lowering modification. It is a bushing that is offset to allow the caster to come back into factory specs.