Editing Swirl port SBC heads

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==Overview==

Swirl port SBC heads are often overlooked for any king of performance use. This page will weigh the pros and cons of using them in a "street performance" application.

==History==

==Casting numbers and ID==

==Design limitations==
===TBI swirl-inducing vane===
[[File:Tbi swirl port vane.jpg|thumb|left|350px|TBI swirl port vane]]
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===L30 5.0L Vortec vane=== 
[[file:305_VORTEC_SWIRL_RAMP_CN_059.jpg|frame|left|305 Vortec L30 casting number 12558059]]

[[File:305 VORTEC CHAMBER CN 059.jpg|frame|left|305 Vortec L30 casting number 12558059 chamber]][[File:L31 305 VORTEC HEAD CASTING ID.jpg|frame|305 Vortec L30 casting ID]]
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==Modifications and porting==
[[Category:Engine]]