Hi, this is my first time on the forum so bear with me if I don't get things quite right. I tried this on the weekend but it got lost somehow. My question is this: I'm looking at an early (1939) Winchester M70 in .270 next weekend. My understanding is that models prior to serial number 180,000, which 1939 would be, had a different safety than the wing safety currently used. If this turns out to be the case, how difficult would it be to convert to the wing safety? While the gun supposedly has excellent original bluing, the stock has been refinished. With that in mind, I'm not too concerned about making some changes, as long as they are tasteful. Any help here would be appreciated. Mark