Hey guys, I have come across a cheap model 70 in 264 Win Mag with a horribly rusted barrel. I have been wanting to make a 358 STA and didn't know if I could put a new tube on that rifle without modifications. What do I need to do to make a long action into a magnum long action. Is it expensive, something I could do with parts? Any advice is appreciated. Thanks a bunch. PM or reply to post.