Broken Piston Rod

[DaveTN]

I've cleaned up worse looking crankshafts.

 

[ksgillyfish]

Hello,

I am working on rebuilding my Briggs and Stratton. I found a used crankshaft for a reasonable price. I have two questions.
1. In removing the counterweight from the crankshaft, a little plastic end cap broke off. Is this part necessary?
2. There is a small round metal area that is chipped in the bottom of the pan where the crankshaft goes. It is right above where it says 216A.Will this hurt anything?
I have included pics.

Thanks
Kevin