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Intake runner volume 230cc Combustion chamber volume 64cc 22.3 deg. Valve angle (Angle machined 0-100) 40/60 Valve spacing Intake Valve 2.100 dia. x .200 long* Serdi # 2TN-B1 (45 deg. seat) Exhaust Valve 1.600 dia. x .200 long* Serdi # 1st cut: H1X1-A1 Serdi # 2nd cut: H1X2-B1 (45 deg. seat) Raised intake runners (Higher than 10RI) Spread port exhaust Intake port opening at gasket 2.05H x 1.34W Distance from floor to deck at gasket .67 Intake min. cross sectional dim. 2.47 sq. in. * 2" springs require .300 long valves If using
offset rocker ARMS, offset lifters are required
If using 350 or more offset rocker SHAFTS, offset lifters are not required 867 Pontiac rocker bar preferred Intake gasket FP 1263 Exhaust gasket FP 52464 Angle milling .0078 in. per cc Flat milling .0060 in. per cc
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