hey man, just had my fx on a lift doing brakes & I looked at this again. your right, there is a lot of room that this can come down, more than I originally thought. maybe up to an inch & 1/2 even, as the bracket that mounts to the spindle from the strut extends down a bit & can be cut for more clearance. to do all this for 1/2" I originaly thought maybe not worth it, but up to 1.5 definatley would be...
looking at this I think it can be done if an upper bracket extension is made above the existing, wrapped around the strut tube & then welded only to the oe bracket off the strut. that could be done. I would do it over a bucket of water & every 1/2" or so dunk it, then dry it & weld again, as long as there isn't enough heat to warp the tube or damage the seals it should be no problem,
another 1.5" with no sacrifice in ride quality would be sweet. I'm thinking maybe to try this with a new set of struts... I would make the top hole adjustable too with a cam bolt like the rear so absolute perfect angle would be a little less critical & alignment wouldn't be an issue...
another alternative I thought might be feasable would be to use a strut from another car, but the difference would probably be too great, I want to look at the g struts or m & see what possibilities there are there, the g or m spring would be too low spring rate, but maybe a g or m strut with an fx spring? haven't really seen any g/m struts, wonder if there similar design & mounting to the fx...