Yes it would apply to the stockers as well. Boxing the stocker will make it tons better than stock. As for you being able to rotate the spring at full droop,k dont worry about it. I once had a saturn(no flames please) that I installed some e'brock lowering springs on. The springs were so much shorter than stock that I actually had to hold them in place when I lowered the car back on to the
suspension so they would hit the isolaters. You will not hit full droop driving on the street. or even at the track for that matter.
For example. During testing of an unnamed car I was working on a few years back. There was a section of the test track that was pached(sp?) over. The pached part of the track somehow was about 3 inches lower than the rest of the surrounding track. The car was doing 197 when it hit this section of the track. It got airborne as our sensors indicated no forces on any 4 of the tires at once. it was airborne for .8 seconds(believe it or not this is a LOT). The
suspension never hit full droop... shocks and anti roll will both prevent this. If it would make you feel better go for a VERY spirited drive, but dont put others lives in danger. Look at your springs when you get back, I would put odds 1000:1 that they will not even have rotated. Good luck
Edit: in my original post I was actually talking about poly bushings not spring isolators. The poly spring ilolators will last longer than the stock rubber pieces. Other than that I really can't see a reason to put them on as I can't think of any performance reason. As for taking them off and putting the rubber one back on. The only difference I think you will se will be a slite hieght increase as the stock rubbers are thicker. G/L