The two black pieces at the top of the pic were the "trans cases" and were borrowed/modified for something that was likely custom built. I'm guessing the sprocket parts were borrowed from something else too? I'm doubting the sprockets were custom machined by the same previous owner who hacked up the plastic mounts....anyone who could do the pro machine work on the sprockets could've machined better mounts.
![Confused :?](./images/smilies/icon_confused.gif)