Do I think it’s fine? Probably. The old model sevens had 3 screws and were light rifles. The base having a recoil lug will help if it was loaded when mounted. That being said, I would get it fixed.
I have a NF steel 15 MOA that is no longer made with 8-40 screws. I got it in a trade years ago and I’ve never gotten around to having one of my rifles tapped for it.