:O
I paid over $100 incl S&H. Oh well, live and learn.
I got the Steeda/FRPP spacers. Now, I'm confused to why you and other had problems. The spacer is 0.25" tall. The Stock OEM upper rubber isolator has an inside and outside "wall" of ~0.40". The Energy Suspension uppers isolators that I have laying around (I went with different ones) have an inside wall of ~0.50" and and outside "wall" of ~0.35".
I also have 10 pairs of front springs (long story). I don't see any problem putting the spacer between an upper isolator (new or used) and the spring. Just use a tie-wrap (new method) or electrical tape (old method) to keep the isolator and spacer on the top of the spring while doing the install.
Also, putting the spacer between the spring and the isolator will raise the car about ~0.05" -> 0.1"

since the end of the pig tail will not "indent" the isolator more than the rest of the flat part of the spring.
I've read a few times about people having problems putting the spacer between the spring and the isolator. But, now, I don't understand the problem. Maybe someone can give me more insight into why some people had problems? Is there something I'm missing?
white50:
Thanks again for the info!
The delivery of my 95 Cobra *R* springs will be delayed to next week. So, I'll give Steeda a call and then I could return these X2 ball-joints & spacers.