purchase some struts/shocks kyb gr2 are fairly stiff and the AGXs are better, plus adjustable...
If you dont have money for coils.
If you do have an extra 800 or so laying around, look into k-sport coilovers.... should pay 800-950 for a set and they are very decent.
Unfortunately if its a 240 and springs are involved theres gonna be some body roll. You can only get stiffer components to remedy.
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Buying/Selling on TR is like shaving your ass before going to prison. You know your gonna get fucked, you just try and make it as pleasant as possible.