Will my cast iron part need extra work done to it when I receive it?

Yes.  All cast iron parts should be seasoned before using in a normal coal or wood stove fire. 
Some of our parts are no longer available through the manufacturer because they have been discontinued. So in order to keep the part available for our customers we remake these parts. In the process of recasting a part, some parts might need additional grinding and/or drill holes put into the part in order to have the part work correctly. The customer would have to do this grinding and/or drilling. We recommend doing the additional work BEFORE seasoning.