blueprinting a trans engine carb whatever.. is basically tearing it apart and rebuilding it making sure everything is exactly in spec. No actual blueprints are involved i dont think.

Yes the front drum of the 413 is one of the big weak point (along with the valve body). The budget racers just stuff in an extra clutch pack into the drum. The better way to rebuild it is to either use a turbo mini trans or get the front drum out of a 3.0L 413 trans. Its bigger and holds more clutches yet fits (413 = 413... aint dodge smart!). People also tweak the VBs to make them shift better. Raise the line pressure. And put in heavier bearings.