Calculating suspension geometry - Working BACKWARD from Roll Center

AutoCAD has been full 3D since release 10, it'll do just fine. I overlayed what I had on your pic above, and your inner points are pushed aft. The center of the light blue double ringed circle is what should be the origin (between the green beam and darker blue floor plate). The origin is ~249mm aft of the axle, and ~345mm outward from car centerline. See page 72. I think you'll find you also need to drop the body side points significantly.

 

Okay so quick update. The front suspension looks great and matches the data I have, thanks to you lordpantsington. I got the rear to match all the data I have as well. At first it just looked very wrong and too low, but after studying the suspension kinematics pages Im starting to think it might actually be correct.

Here's what I have: