I see many people confusing a GM Engine with a Bow Tie Engine. They think that all GM built blocks are Bow Tie. Not true.
The "Bow Tie" block is sold through the GM High Performance stores. Some dealerships are labeled so, but not all. There are a few grade levels of Bow Tie Blocks from Sportsman grade to full Pro Grade.
Don't take a seller's word for what he is selling. He may not know. Do some research on how to identify a true Bow Tie engine block before you buy it. They have extra features that make them easy to replace your GM block.
The "Bow Tie" block is sold through the GM High Performance stores. Some dealerships are labeled so, but not all. There are a few grade levels of Bow Tie Blocks from Sportsman grade to full Pro Grade.
Don't take a seller's word for what he is selling. He may not know. Do some research on how to identify a true Bow Tie engine block before you buy it. They have extra features that make them easy to replace your GM block.