Brake master leaking and replacement

Hi my name is Josh and I'm a dummy for not posting about this sooner. 

So I realized my brake master cylinder was leaking on the shaft side a couple weeks ago. So I figured I'd ordered the right part as shown in the picture from TRW, and I am still unsure if it's correct part as I've hit a roadblock. 

Right off the bat you'll notice that the shaft is significantly longer, I do not know if it is possible to swap shafts as of yet.

My roadblock is in trying to remove the rod for the brake bias. When I unscrew it full length either way it jams up at the end and I am uneasy in forcing it. 

Looking for any help or suggestions in moving forward and also any input if I may have ordered the incorrect replacement part. My local radical dealer informed me he was able to supply me with the replacement part but it would be weeks away and I'm hoping to be on track in two weeks at this point.