connecting rod and harmonic balancer question

During the disassembly of my 360 i found two items that brought concern to me.

I pulled the pistons out of my 360 today and found that the number two of the connecting rods was different them the others. Should i be concerned.

The second is the harmonic balancer has cracking to the rubber seal on the back side. Does it need to be replaced. if it does any recommendations.

Any input would be appreciated.