My 58 still has the straight axle. No power steering. My truck drives fine, and I don't have any problems with "bump steer".
If someone is having issues with "bump steer" something is loose, worn out, or out of adjustment.
It can be a bit tiring trying to turn the wheel at a stop, but once I get moving just a bit it eases up.
My wife drives it and I know not to mess with her now.
