There was a time when Brownells sold the lefthanded safety (You needed an FFL). I'm not all that competant, and had the job complete in about 15 minutes. The buttstock comes off, the trigger group comes out, and the safety is removed, and replaced with the new part.
Since Ithaca went down the tube, Brownells doesn't have the part any more. You might check with Gunparts, inc.
Couple of years ago, after aquiring a model 37, I purchased a half dozen williams giant head left hand safetys from brownells. Figured they would be there when I aquire other ithacas. Man I am glad I bought all those safeties.
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