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How to spot a strong production 350 SBC block.

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The Reluctant Gearhead.

There are a few visual clues to tell if ya have a thick production SBC block or not. Some 350 blocks are good to 400450hp, while some are good to 1000+hp. They definitely aren't all the same. 6774 350 blocks generally will hold the most power. 70s Mexican blocks are heavy duty.

posted by wybuantte