@hammerin hank, to me, it seems fairly easy and straightforward (but I have also done my fair share of legwork and measurements). I could put a set of these in my housings and bolted up the my car in about 1 hour tops. But again, i have taken off my dampers/housings/whatever numerous times so I have a fairly solid idea of how things go back together.
If the Basic housing's inside diameter (ID) is not large enough, there is no sense in going any further, if you know what I mean