GM 10185087 Castings
Intake runner volume 173cc
Combustion chamber volume 63cc
Intake Valve 1.940 dia. x Standard length
Exhaust Valve 1.500 dia. x Standard length
Intake port opening at gasket 2.01H x 1.24W
Distance from floor to deck at gasket .22
Intake min. cross sectional dim. 1.826 sq. in.