Checked my computer version of the FSM: hold a straight edge against the threads, they all should touch, if some don't, they have been stretched, replace the bolts. I'd have to re-read it, but I think you are supposed to replace in sets.

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1984 300 D runs, interior
1984 300 D light hit in front, RUST, mint/perfect dash, decent interior (see above), parts car
(hate to kill one)
1998 Dodge diesel