[DanEC]

I don't know all the answers but that bent push rod definitely does not look right to me. Not sure what is up with that - but I suspect it isn't right. That would also affect the balance bar setting. I suggest calling Bob or Doug if Bob doesn't chime in on your thread.

You only need to replace the master cylinder that is leaking - no need to replace both. However, while down there and bleeding brakes you might want to do it now to possibly avoid doing it in the next year or two.

The needle bearings are not subjected to continuous duty so they are probably fine - but it could not hurt to lube them if you can.

When I google that part number I get a lot of varied hits including a few cross-reference charts. It may be a Nissan or Infinite OEM part.