Bonneville Landspeed Racing - Let's Try a Thing.

So, I have a dilemma. I am trying to sort out what gear ratio to start with. If looking to be at max effort at 2.25-3 miles. Also, it seems a taller gear ratio seems more common that overdrive trans. It should be accelerating faster with a shorter gears and OD, but traction is also a major factor. The car currently has 2.94 gears. I know of a 2.76 center I could likely get. I even have a 2.50 quick change that could go in, but where to start? To me, the 2.50 QC is better for when I make the long course. Thoughts?