Slow and steady progress on the Supra. I found a smoking gun, a vacuum circuit that isn't holding pressure. This circuit is only important for operating the second turbo and doesn't come into play at all when there's <10psi of boost pressure from the first turbo. It adds up in my mind. The problem is getting to the vacuum lines at the back of the engine! I worked on it a few hours yesterday. Today, the main wiring loom comes out...
The paint is coming along fairly well. https://photos.app.goo.gl/SLdH0lIJTlnTbArr2