Intake: Gasket match and full bowl job. For advanced porting work on the short side radius. have the rough casting polished
Exhaust: Full bowl work and if there are still smog bumps have them removed. have the exhaust fully polished to get rid of the rough finish.
Mine were professionally ported before I bought them with the rest of my motor and I have a flowsheet that reads 243cfm @.600 lift int. and 198@.600 lift.
The chambers on my heads were also worked to unshroud the valves.
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393W: AFR 205's, hydraulic roller, TKO600.
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