Crate Racing 421 SD's 88 Catalina Super Duty ... and Performance at the time to famed Chevy engineer Zora-Arkus Duntov revealed the engine was putting out much more power than they'd officially ...

Show full PR text NEW ZZ6 CHEVY SMALL BLOCK ADVANCES CRATE ENGINE LEGACY Revised Fast Burn heads with LS-inspired valvetrain enhance high-rpm performance 2015-10-02 DETROIT – Developed with ...