here is some more informaton on the PRO COMP heads I am ruinning
320 cc intake runner
115 cc chamber
Manley Performance Valves
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1.880" Diamter, 11/32 Valve Stem, +.100 Long Exhaust
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2.250" Diamter, 11/32 Valve Stem, +.250 Long Intake
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XH-426 Stainless Exh.Material, NK-842 Stainless Int. Material
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Chrome Stems, Hard Tips, Swirl Polished, Fully Machined
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11/32" stem