I noticed on removing my old BB springs that they were not that easy to get out and would be very hard to go back in if that was the case. I went with lowering spring so they went in easy and came out easy when I had to pull them to cut. Going into the upper pocket correctly is a must. But it also has to line up correctly on the lower arm and only lines up one way and must be correct. Shocks are the same BB or SB but SB weaker.. You must line up the bottom of spring to lower arm first when installing, pushing the top of spring into upper pocket as needed. Spring compresser usually needed.