The block is pretty much the same other than the turbo oil holes. It is not uncommon for the turbo Buick guys to replace blown turbo blocks with cheaper n/a blocks and drill and tap oil holes.
GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.