Picked this pricey water pump up on fleabay for cheap, but I think its has been altered. What do you guys think? Its a moroso aluminum for the chevy bbc. I think the holes have been drilled and tapped. The seller claims it hasn't.

http://img488.imageshack.us/img488/5224/dsc02576jy4.jpg
http://img488.imageshack.us/img488/2378/dsc02575zl8.jpg