You'll have to go with the long cage for sure, unless it's a single up front.
Even then, a DA may not really like a 34t, but I'd try it. What are you using up front (ring count)? We're going to calculate chain-wrap here.

And I lived in Annandale back when (WTW '76 here). Arlington is not hilly
Now the Kennedy house did sit up on a nice little rise overlooking their spread. (I was a worker bee putting in their Grasstex tennis court)