Power steering conversion in '57 3200

[roger55]

I want to upgrade to power steering.
I'm putting a 305 TPI and 700R4 in the truck and am keeping the stock straight axle.

It looks like there are two (soon to be 3) different ways to go.

It seems the most often done conversion is with the Saginaw GM truck box that mounts on the outside of the frame.

Then there is the Toyota box conversion that keeps the box near where the original box is.

CPP says they're coming out with a new kit similar (in installation and workings) to the Toyota box conversion that uses their "CPP 400" box. It's supposed to be available in a couple of months.

I've read some comments that the GM box is prone to bump steer and steers too easy for an original steering wheel. I do want to stay with the original steering wheel for the classic look. I will most likely be going for an aftermarket shift column. I'm looking at the Ididit.

So, my question here is whether the Toyota kit better for drivability than the GM outside frame rail box is?