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Old 11-10-2012, 04:18 PM
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WDCreech WDCreech is offline
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Originally Posted by beertracker View Post
Creech, I want to make sure I read this right. Do you mean Pontiac dealerships\service centers saw block #557 failures in stock engines? Or were these #557 blocks hot rodded up then failed?

HP numbers back in 77 was pretty low for a stock 400 block I believe 220 hp or so.
I don't know for sure, but I understand that the factory went back to the earlier block before production stopped in 1979.

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