: Popular upgrades from specialists like Butler Performance can turn a standard 400 or 455 block into a high-torque 467 or 500 cubic inch powerhouse.
: Upgrading to a high-flow water pump with a machined cast or billet aluminum impeller is often recommended over factory stamped-steel versions to prevent overheating. pontiac performance part
: For high-horsepower 455 builds, using ARP studs and potentially a lifter bore brace can prevent block failure under extreme stress. : Popular upgrades from specialists like Butler Performance
: Custom roller camshafts and roller rockers are essential for high-RPM reliability and modern power profiles. : Custom roller camshafts and roller rockers are
: Most Pontiac V8 performance parts (326 through 455) are interchangeable, making it easier to swap performance components between different engine sizes.
: High-output HEI distributors and performance alternators from Speedway Motors ensure the engine can handle higher power demands. Recommended Performance Parts & Brands
: Upgrading to aluminum "Round Port" or high-flow "D-port" heads from brands like Edelbrock or Kauffman significantly improves airflow over factory iron heads.