Thanks to all who for took a look at my mystery piece. With the help of folks here, it was identified as a piece that goes in the foot rest assembly.
I just laid 10 coats of paint this afternoon on my side covers and tank. Need to let it cure before sanding and laying down some accent color and clear.
Motor was painted wrinkle, and I swapped out most of the hardware for stainless Allen heads. I need to replace the screws that hold the started to the block, and if possible, the bolts that hold the starter itself together.
Once the starter is taken care of, I can put the motor back in the frame and really it's just waiting on carbs from PJ, a new harness from Sonreir, and cleaning up the exhaust and deciding what to do with it.