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Buick Hybrid Guy.
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255 Posts
GM parts experts jump in here and correct me if I'm wrong but Dart and Motown are making them. The bowtie would be the only 400 based block that I remember right?
~Scott
 

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1,680 Posts
We do a lot with blocks and GM Makes a Bowtie block with 400 mains but going to the 350 mains will free up some bearing friction and the Bowtie is nothing like the 400 block as the Bowtie has thicker decks and cylinder walls better webbing and better caps and the blocks are a lot closer to blue priint then the 400 block from what I have seen.

Dart offers a block and World does but on the world blocks we have sen a lot of issues with them and don't offer them any more to our cutomers.

The Brodix block will be an aluminum block very exspensive
 
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