That safety jacket is correct. The jacket should not be bent out like that, but if that is what gets it to stay in place, then so be it. You could take it apart and straighten it up. The top of the jacket should butt up against the bottom of the tang on the frame. To prevent it from moving when the triggers push up on it.
That jacket assembly is the early style lever. Vs the other one you mentioned with the smaller top is the late style lever. The safety slide springs are different with each style lever. The changeover was around 1917 or so.
The bent jackets are the same, so the levers can be swapped back and forth.
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B. Dudley
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