[highwaydevil]

I just replaced the rag joint on my blazer, and was trying to line it up to bolt to the frame, when it refused to turn. I don't have the steering shaft hooked up yet, so that can't be it. What could cause it to suddenly bind up? I was LIGHTLY tapping the coupler on with a rubber mallet, so I wouldn't think that I damaged anything in the box. Any ideas?

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1972 blazer4x4, 350/350, factory a/c