284 Winchester

[Whisky]

I have never built a full custom gun before, so I don't know if this is possible or not?

Any recommendations?

I would recommend you track down and talk to a smith who is very familiar with M70 actions, and get his take on it. Personally, though, it may sound like more work than it's worth. And a bit of a gamble if you don't know how it will all turn out until it's finished.