Changing the recipe a bit. I'm lucky enough that me and a buddy are brewing this at a local commercial brewery for his homebrew club's meeting. The brewery is supplying everyone's base malt and yeast. So, that 17 lbs Marris Otter will probably become Rahr 2-Row. The yeast will most likely be an American Ale yeast. Also, the Chinooks I bought are only 11.1% AA so that drops the IBUs to about 65. Expected OG is 1.106 given 80% mash efficiency which is what my buddy usually gets with his mash tun. Also, going from marris otter to rahr changes the color to 50.6, not that it's really noticeable that dark.
edit: local water is perfect for a stout so no water treatment as listed above.