I’ve been reasearching alternatives to the factory power steeeing unit on the 1957-61 models as well. Another way that’s popular with the hot rod builders is using an electric power steering unit.

The electric power steering setup replaces the factory parts and doesn’t take up space which can be critical when swapping in a different engine.

I haven’t made the decision to pursue this, so if anyone has experience that they could share it would be appreciated