Vortec L31 cylinder head
(→Pushrod guide holes: changed "ovoid" to "oval," ovoid refers to a three dimensional egg shape, but the text refers to a two dimensional cross-section of a tube.) |
(→Upgrading and compatibility) |
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| Line 192: | Line 192: | ||
* L31 heads | * L31 heads | ||
* Springs if the cam has a valve lift over about 0.420" | * Springs if the cam has a valve lift over about 0.420" | ||
| − | * | + | * 1987 to present center bolt style valve covers if the heads used previously were perimeter style (1986 and earlier including the current production Goodwrench 350 crate motor) |
** Note: [http://www.crankshaftcoalition.com/wiki/Vortec_L31_cylinder_head#Small_port_Vortec_head_p.2Fn_25534351_.28bare.29_and_p.2Fn_25534421_.28assembled.29 GMPP small and large port Vortec heads] and other aftermarket Vortec heads accept either perimeter or center bolt valve covers [[File:Vortec valve-rocker.jpg|thumb|right|300px|Self aligning stamped steel rockers]] | ** Note: [http://www.crankshaftcoalition.com/wiki/Vortec_L31_cylinder_head#Small_port_Vortec_head_p.2Fn_25534351_.28bare.29_and_p.2Fn_25534421_.28assembled.29 GMPP small and large port Vortec heads] and other aftermarket Vortec heads accept either perimeter or center bolt valve covers [[File:Vortec valve-rocker.jpg|thumb|right|300px|Self aligning stamped steel rockers]] | ||
*Self aligning rocker arms | *Self aligning rocker arms | ||
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