I can't speak from past experience, but I think a good way to find out if continuing to pay on it would benefit you by being able to get a larger LOC is to just call up Bank of America and explain what you are looking for, and what'd you need to do in order to get it. Without too much hassle I think they should be able to tell you if you qualify for a larger LOC now, or if continuing to pay on your existing BofA loan would help you get it. I do know that BofA has a "custom score" model that is different than FICO scores.
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