which gear ratio for 1/4 mile

Just some FYI, I went from 4.30 to 3.73(what I had) and time slips were the same or a 10th or so better. Picked up 2 mph so it was telling me that 4.30's were little too tight for top end.
Was going through the lights at 62-6300 now about 5700. So now I'm thinking 3.91 or 4.10 should get me at 6000 through the lights like my shift point.