Ryno,
If yours has chrome that is certinaly an oddity...please post pics!
My Century Yugo rifle (serial in the 500 range) most certainly does not have a chrome liined barrel, nor does any other one I have seen, and I have handled 3 or 4. Also, they specifically list them as being U.S. made non-chrome lined barrels. Does it have the chrome ring around the chamber and at the muzzle when the brake is removed? Pics man, pics! If it is indeed chrome lined, best guess is maybe they tried a short run of chrome lined barrels but decided they were too expensive and went to non-chrome lined after the first few rifles.
I have not handled the kits from Centerfire, but as a fact the Yugo guns were not chrome lined, adn in fact most of them that came into the country have dark bores becuase of this. I would seriously doubt that any of the ones Centerfire has are chrome lined. if they were, they would be charging a shit ton more for those as the bores would be in much better condition.