Aftermarket coil overs will require the installation of EDC’s. These cancel out the need for the shock feedback/resistance. KW and RSR make them for the Supra. They plug into the harness where the factory plug meets the shock bodies. As far as coilovers are concerned chose based on your use...
Your issue is too many spacers. You can contact PhD for recommendations for your specific ride height. I run full SPL with KW CS and the eibach sb with 18” Titan 7s and 315 square. I finished a full track season with no clearance issues. See attached for reference. I would add one more of...