I doubt a spindle would make the cross read that low. I can see maybe 5%, but not over 20%.
Hopefully the frame isn't bent, but with the cross that low my experience says something is wrong with the chassis.
That would do it .
Just for a perspective look
If one washer is 1.5 % cross at .060 or roughly 1/16th inch .
That would be one inch plus to lose 20% .
Now this is at the spindle and likely not linear .
James had a very good observation .
I'd say you still got something off you should not have to have washers on both sides maxed out to get 67 cross.I think I may have figured it out, I believe my scale stand was out of wack. Took the pads off the stand and placed them directly on the floor leveled, and had 66.8 cross. Not sure if this is the right answer, but all my numbers was close after that