Length of center link on steering?

[Mutt's37Buick]

I'm working on a selecting, or designing, a center Link length for my rear steering on my '37 Buick Roadmaster. (See sketch).
I'm hoping one of you experts can help me with some questions:
1) Is it ideal to adjust the center link so the connection to the tie rods is in line with the axis of the lower control arm (as shown)?
2) If not, then what is the best design to avoid bump steer?
Thanks

 

[Krooser]

It's best, IIRC, to make the pitman arm and idler arm be at the center of the lower a-arm bushing/mounts. That's how I did it on my Ford Galaxie when I built my center link on my last dirt car.

The outer tie rods should be mounted on straight steering arms without any drop... that's the preferable way.