Staska: You can probably find someone on one of the Prius forums or Ecomodder who can answer your questions about the final drive used there.
When sufficient space for a drive could not be found near the rear axle beam pivot for the rear wheel drive, I decided to look elsewhere. In a previous reply (above), I discussed placing the rear wheel drives BEHIND the rear wheels into the space between and below the rearmost sheet metal and the plastic rear bumper cover. A series of good photos of this area of the Insight can be found on Yves Morrissette's Insight Mods blog
Welcome to my Honda Insight home page .
With careful planning it may be possible to install the drives in this space with a minimum modification of metal and/or plastic Insight parts.