I recently received my build card and one for a friend. The listing on the  card for my friends 770 is accurate but the card for my 880 has some things different than are on my tractor now. How common was it for the dealer to change things after the tractor got to the dealership? An example is my tractor left the factory without a belt pulley and now it has one. On the line for power train it list power boost, would this be where they would show the 2 speed power shift? The card shows it had dual front wheels with power steering no wide front no power steering. Heavy cast wheel center now light hubs. I know some of this could have been replaced because of wear &amp; tear but did dealers change out parts on new tractors for customers?
Thanks 
John Schoenauer