JL97COBRA

I have a 97 SVT Cobra and I bought eibach springs, dropped front 2 1/2 but i dont want the rear dropped 1 1/2. I want new springs on the rear and I only want it dropped .5'' from whatever the oem height is.. Question is.. how do I find out the oem height so i can get the same height and cut off .5'' and/or are the any springs out there, new, that gives you only a .5'' drop for rear bc i havent found any. Also, I'm looking to put new shocks/struts on.. What kind would be best for my car?