idk about running lowering springs on those struts. just like any wbody strut, gabriels will be prone to shorter lifespan.
going back to the springs tho, it really depends on your drop. ssc's tend to have even drop w/ no ass sag (iirc its 1.5in), eibachs lower nice and low and a tiny bit more in the front. (iirc 2.0in or so).