^^i think you can, I calculated the rear springs would need to be 600lb if using a coil over setup, so they would match the fronts of 500lb. The equivalent oem style rear spring would have to be 1200lb to match the front. At 600lb I do not thing the rear towers would give in, seeing how the gts runs a rear coil over. If you then factor in sway bars, in my case RD sport, I calculated again the front would need to be at hole 1, and the rear would have to be at hole 3, to match spring rates and effectively giving, at 2" of deflection or compression, a total of 1200lb spring. I hope this makes sense :/
AA Filter : BFGoodridge SS Lines : Challenge Sport X-Pipe : Vorschlag Poly Engine Mounts : TMS Subframe & Diff Bushings : KW S/O Kit : RDSport Sway Bars : MRF Eng Shaved Guide Supports : E36 Bumpstops : Mach Schnell UP : UUC SSK w/DSSR : ZHP Shift Knob : Evolve Tune Stg 2.
Needs install and swap -> TE37SL : Brembo BBK : Nitron NTR R3