Re: ZL-1 stamping numbers
Do both of the ZL1 blocks have the Winters foundry snowflake casting mark in front above where the water pump would be? Also do they have the screw in freeze plugs or the std. type sheet metal freeze plugs. Just curious. Chevy was also selling a Can Am block with the 4.400 in. bore and siamese cyl. that was used for racing. I think this is the one that Yenko and Bill Smith sold in the 80's.
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