Yeah, 85 would throw you off. Check out this site for a conversion calculator http://kotmf.com/beer/tools/
You could add the honey, but it would thin out the beer and throw off a pretty balanced recipe. The age of the grains shouldn't matter at a week.
As a wise person said once, malted barley, yeast, and water want to become beer, so don't worry. And as Charlie Papazian says, "relax, don't worry, have a home brew." (RDWHAHB)
Let us know how it turns out!