You really want a better spring.
Sportlines are way too soft for the amount of drop they give. They handle like garbage because by the time they compress enough to be firm, you're already on the bumpstops.
I had a set with Tokicos and the shocks helped a lot over the FRPP kit shocks (svt basically), but it still wasnt a great setup
==2012 Kona Blue Mustang V6==
==1995 Light Iris Neon Coupe==
==2005 Sangria Red ZXW==
Sold but not forgotten: 2001 ZX3, 2007 ZX3, 1972 Skylark