Originally Posted by beemerfan

Attached are some photos. Depending on how far you want to go, you are not done with the motor mount alone. The chassis may need milling (or Dremeling) in several areas. The chassis reinforcement below the pinion in particluar. You may also need to remove some of the outer reinforcing wall next to the motor as well as the rear wall to allow space for the sensor wire. And in some cases, you may need to modify the right rear chassis brace. Check the pictures, they're worth a thousand word explanation. With all these mods combined, I can get a 62 tooth pinion in with an 84 tooth spur (64 pitch) for a final drive ratio of 3.39. That gear ratio isn't of much use though on anything but an oval layout, so you probably don't have to go as far as I did. It was a trial and error learning process for me.