What you're looking at should be a MOA set up fairly easily, and good reloads should get you close to 1/2MOA.

I think the only upgrade would be the glass but you considered that.

The Richard stocks have gotten some bad reviews, but I think this had to do with how much work was required as received. But since you've used them before, you know what to expect, and maybe you could give us some feed back on them?

For caliber, even a fast twist 243 would be adequate for coyotes and 1000 yrd shooting.

I must say, I am jealous of the time you'll get to spend with your grandfather!

Adam