I have a Stainless Classic Model 70 from the 1990s that I foolishly rechambered from 338 Win Mag to 340 Wby. This is a New Haven gun. I'm in the process of changing it back to 338. I have purchased a factory barrel in 338 with the correct New Haven stamp and threads. However, I need a few parts that may be a little difficult to find - ejector blade, bolt stop, mag box, follower and possibly spring. Will the parts from the new FN Model 70s fit?