You wouldn't need the Bundled or Convenience packages with the 801A, as it's included. The Power Tech is a standalone that can be included with the pheasant package 800a or added onto the 801/37 package. Now, instead of the 802, the 37 package in addition to the required 801 is going to be the top dog. Just think of the new 37 as the old 802a w/beadlocks and stickers - full send package.
And for your monthly payment calculation, just google search loan calculator and start with a fully loaded truck of 84K plus TTL.