The Lyman sight is nice, but much larger. I believe I read somewhere that the sight itself or the stock would need to be altered for it to fit.
You are so right and when I installed one on my Penn, Hunter, I chose to modify the sight. Really didn't take much and it worked out just fine. TC, is no longer lising their peeps in there catalogs. Might I suggest a vernier tang sight, instead. I personally prefer them and they are more, "in the Spirit" ..
Be Safe !!!