While these small-block crate engines can't match the power output of Chevy's most powerful big block ... Based on the LS-Series Gen-IV cast-aluminum block, the LS376/515 crate engine has a ...

Part of the MKIV generation of Chevy big blocks ... offering at least 465 hp in factory configuration The Mark IV big block line was followed by the Gen V, VI, and VII Pontiac's V8 engines ...