Small Block Cylinder Heads
CC's / Port Volume / Size / Flow
1966 - 1967 {273} Casting #2658920
Heart-Shaped Combustion Chamber
Factory CC Level..........................61 to 63 CC's
Recommended Minimum CC's......57.3 CC's
Intake Port Gasket Size...............1.05" x 2.07"
Exhaust Port Gasket Size.............1.14" x 1.59"
Intake Valve................................1.78"
Exhaust Valve..............................1.50"
Intake Bowl Size.........................1.53" {86% of Valve}
Intake Port.................................125 CC
Exhaust Port...............................61 CC
Intake Flow...............................165 CFM @ .450" Lift
Exhaust Flow.............................107 CFM @ .450" Lift
Intake-to-Exhaust Flow.............64.8%
