9" rears dragging
This is funny, as I just had the same issue with my 10" rears.
In my case I was missing one part and did not realize it. Also the shoes were constructed different than all the others I had for reference.
Green is like all others I had, red was new.
This guide plate was mia when I was reassembling the brakes yesterday.
The day before I went for a drive and the right rear was dragging when I got home
140deg vs 100 on the left
When i took the drum off the forward shoe was stuck behind the pad on the backing plate.
I'm guessing a combination of the shoe being different and the missing guide was the cause.