interesting...I own both an SC400 and a 65 A. Word on those Upper and lower control arms...no serviceable ball joints and nothing new is cheap on a Lexus/Supra. And they do handle like a ****..... if you need an SC measurement I can oblige.
I'd love to see a hub to hub width measurement on the front end. If it's close to what the math says it is the project seems like a non-starter to me. What you can run for tires on an SC400 and what will actually fit on an A-body will be entirely different things...