i notcied my rear struts are starting to squeek a bit...so what better excuses to buy new ones and lower it

my quistion is....i have a 2.2 auto...will the drop be even in the front and back? (i read somewere it wouldnt drop the front) also, are the springs all i need to lower it? and will it work with stock struts. and should i go with sprint or eibach....please let me no.