Not all stocks in that period had salt issues and chances are your stock may already have been replaced. I would test your stock for salt. Scrape the wood to get a fresh surface, apply a 1% solution of Silver Nitrate, if it turns white you have a slat wood stock, if it turns purple you don’t. Easy test that is 100% fool proof. Just pick a spot out of sight for the test. The salt wood kept showing up until about 1971-72 but mostly was earlier. Good luck.