How much racing do you do? i hate to say this, but it could be a torque box, although id say it's most likely the control arms, my car feels (mushy) and sways a little too, especially under hard acceleration

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90 lx coupe: 175k miles, steeda water pump pully, hurst shifter, Mac cold air fenderwell, accel supercoil, ADS chip, aluminum D/S, Black magic fan, 3.27grs.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607
next mods: subframes, mac h-pipe