Thread: Zz572/620 hp?

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that a gm 572. not the same crate engine that the links to rspears post that engine a AFR heads and a 4.500 crank so 4.500by 4.500.=572CID your chevy engine has chevy heads and a 4.3/8 crank and a 4.560 bore ?? least they did when they came out .i built many 540to 632 but i have only use some of the 502 zz crate engines and ls6 crate engine and reworked them . on the big stuff i can build a better engine package for the price then Gm crate so many of my customer go with my builds. but i think reworking your engine some i could get to1.3hp per cube and still have it drive easy on the street so 743 hp no power adders less you want some that guy on the video said some thing about big engine not idling ? what the hell? the last engine that made 1200hp could drive it around town just off idle .matter a fact most all my big engine idle quite well with my custom cams in them