I don't think taking a year between undergrad and law school will make any difference, whatsoever, in your application.
25%-75% GPA 3.17–3.60, LSAT 154-160
Seems to me so long as you get something in the high 150s or better, you stand a good shot at getting in.
Regardless of what anybody says, the bulk of the admissions decision is just based on LSAT, GPA and in some cases, the color of your skin.
Any other factor just doesn't matter much and in most cases, doesn't matter one iota.