[Y-Blockhead]

Originally Posted by JOHN CT

I just tried what you said to do. I put a wrench on the nuts and they were hand tight ,but the cotter pin‘s are staying in place when I turn The nut. I removed the Cotter pins and got a few turns on the nut. The only problem I see is the top spring shackle is kind of dry. not enough to cause the sway. While I was under the car it will be stupid if I didn’t check other things out. Now I found the LR backing plate are not very tight :eek wow !! Tomorrow I’m removing the LR drum !! So hopefully between the Spring shackles being a little loose in the rear backing plate being a little loose can solve my problems
I’ll report back when I tighten things up

And I’m glad I got under the A to check things. Having a backing plate fall off while driving can get very ugly!!

Don't get the shackle nuts so tight that it binds on the spring and hanger. I usually tighten mine snug and then back them off a little. You may have been OK.

Good find on the backing plate.