Editing Vortec L31 cylinder head

==Overview== The L31 Chevy Vortec cylinder head is the best flowing production head for the Gen I SBC engine. ==Design limitations== ==Modifications== ==Vehicles that came with the L31 head== [[L31 cylinder head sources]] ==Links== Nasty Z28.com forum thread, [http://www.nastyz28.com/forum/showthread.php?t=56505 Vortec Cylinder Heads: The Definitive Guide]

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