I only see these being of benefit on the 88's. They would allow you to drive your car to the autocross track, add a fixed amount of negative camber, race for the day, then return the camber back to near stock before leaving. The reason I limit this to the 88's, they are the only year where rear camber doesn't effect rear toe. On the 84-87s once you added more negative camber, you would have to readjust the toe as the rear tierods would cause a severe toe in condition when the top of the struts are pulled in.
To use this kit, you will have to enlarge the hole in the top of the strut to gain access to the adjusting bolts as well as the make room for the strut shaft to move.
On my 88, I relocated the top strut mount 1" further inboard using some relatively simple mods, but didn't want it to be an adjustable amount like the one above.//www.fiero.nl/forum/F...2/HTML/120740-2.html