K-frame alignment?
I know it seems impossible that it would make that much difference. Me too.
I just stuck a jack under it, loosened up one bolt at a time and took photos of the alignment of the holes. It's hard to tell though because of the parallax effect and I am trying to hold the camera level and centered under the hole.
I did notice there's a piece of masking tape in there that I had put on the frame to help me align things.
It looks to me by the outline of the washer that it doesn't seem like it's doing the job it was meant to do.
FWIW the bolts are swedged, as they should be