In Part 3 of this MK4 Supra restoration, I’m back in the garage knocking out the kind of stuff that makes or breaks a clean build: HVAC, the steering column, and wiring. This is the unsexy side of bringing a Supra back, but it’s the difference between a car that “runs” and a car that actually feels like a proper MK4 again. I’m going through the process of getting the interior systems and controls sorted so everything works the way Toyota intended—no hack jobs, no mystery connectors, and no half-working switches. A big takeaway here is that wiring and interior hardware isn’t something you want to rush. I focus on putting things back together the right way, dealing with the little issues that pop up as you restore an older chassis, and making sure the steering column and HVAC pieces aren’t just installed, but installed correctly. If you’re restoring a Supra, this is the stage where you slow down, label stuff, verify connections, and clean up the routing so you’re not chasing electrical gremlins later—especially once you start adding power mods and expecting everything to behave.