I think its actually bending in half from towing the hay baler last year. The baler has several hundred pounds of tongue weight and ever since then the back doors drag. There is a picture of the center trim and one of the passenger back door where you can see that the midline trim is no longer straight and the door gap is pretty far off. Once you disconnect whatever is being towed the doors work again.
But it has above 300psi compression on all cylinders!

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1985 300 TD 448K
1984 300 TD 278K

1983 240D euro 240k
1994 f-250 idi turbo 330K
1986 f-350 IDI
1987 F-350 IDI

1985 JD 1050 4wd
1965 IH 3660