I think I found out where the bump steer came from.
The '57 had disc brakes when purchased. Who knows what they came from. When he found original spindles and drum brakes the spindle needed reamed out to allow the upper control arm ball joint to drop in and seat properly. The upper control arms had been changed also.
Who knows what they had as a donor car for the disc set up.
I may be able to take a photo for ID.
Anyone up for a mystery ? LOL !

So the bartender says to the horse " Gee, Why the long face?"