This Video Contains Hands on Step by Step Analysis by
Bob Williams of All Pro Cylinder Heads.

He takes us through a comprehensive study of :
HAND & CNC PORTING * CC COMBUSTION CHAMBERS*
17 - 23 degree & RAISED RUNNERS * ANGLE MILLING * VALVES & ANGLES*
OFFSET ROCKERS * T & D ROCKER SHAFT * ISKY ROLLER LIFTERS *
PUSH RODS* ROLLER SPRINGS * TITANIUM RETAINERS & LOCKS *
SPRING LOCATORS*SEATS & GUIDES * SPARK PLUG ANGLES *
INSTALLED VALVE SPRING HEIGHT * CUTTING & POLISHING TOOLS *
STUDS * D-SHAPED EXHAUST & PORT RUNNER FLOWS * FEL-PRO GASKETS * SCHOENFELD HEADERS & MUFFLERS *
AUTOLITE SPARK PLUGS* UNDERSTANDING SEATS AND GUIDES*
EVERYTHING THERE IS TO KNOW

WATCH AS ALL PRO CNC PORTS AN INTAKE BOWL