Re: well my ZL-1 engine finally showed up...
Bob....just read your post..I had a similar block that I sold a few years ago..I think it ended up in Canada..it has the same cast numbers, cast snowflake, stamped numbers, etc.etc...it was an early Yenko block..it also was a tall deck block..I am not sure if they all were tall decks or not..but You could probably check yours...I will try and dig up some old pics I have...
as far as max HP for a ZL-1 block, Ive had 2 complete ZL-1 motors with over 750 HP....They were and stilla re the most radical-racing oriented option ever put in a Chevy..imo..
Good Luck with it!!!
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