Hatch air question.

Ok, I purchased a 91 hatchback last weekend and I ordered air for it right away. I'm going to be installing everything this coming weekend. I have messed with mac cars with my neon but i'm new to the civic thing. My question is, I was looking at the forks yesterday and if I set it on the lowest hole it seems that the fork is going to hang low. Is there anything I can do or should I not even put it on the lowest hole? I have a set of 18x7.5's with a 42 offset, so I might have to go with the middle hole. Any help with this would be great. Thanks in advance.