I am not sure if your concern is only the shape of the chainstay or if you wanted to install a kickstand and are now concerned that you can't.

I think bikemig covered the chainstay shape issue quite well, I have nothing to add.

If your concern is that you can't use a kickstand, Surly has big concerns about the kickstands immediately behind the bottom bracket. But the Greenfield ones that clamp on near the rear dropout are less likely to damage a frame. But I still do not tighten the screws too much on my Greenfield and I use blue loctite to keep the screws from falling out. I suspect however that Surly would still have a problem with the Greenfield if you asked them.

The photo is not a Surly, I am only using this photo as an example of the kickstand I am talking about.