Since range is a big part of what you are after, I thought I might share the common formula that people use to calculate range and pack size. I do not know how accurate it is, but a lot of people use it for a rough idea. Take the completed weight estimate of your build and figure out what 10% of that is, as in 3000 pounds is 300. This figure is typically how many watts hours per mile your car will use. If you multply that by the number of miles you want for your range, you can see roughly what your pack size needs to be. Remember that you can only use about 75% of your pack without hurting you cells, so you will still need to oversize the pack to compensate for this.