Update on the build: Wryann and his team at VIP Performance in NE Portland, replaced the suspension bushings on the Supra, less the sub-frame bushings, and the first thing I can feel is how rough the road is in the Kirkey seat. LOUSY roads! I'm glad I didn't have the harder bushings installed! To years ago I had the stock springs replaced with RSR race springs. The spring rate on the RSR race springs are 700f/400r and the Supra is streetable. Now the Supra is more communicative going into turns, feeling the road through the wheel and the seat. It is not a harsh ride, but is close to it in my experience. When I upgrade the wheels and tires to 17x9 running 40 series tires, I expect more feedback through the steering wheel and seat and hopefully no additional, noticable harshness.
As goes the JDM ECU: It has problems now, it's not processing the knock sensor signal, so it is toast. I ordered replacements, as they were both under $90 shipped. Hopefully, one of these will last longer than one year, as the current one did.