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SSDiv6 · 05-18-2016, 07:54 PM

Mark is correct.
There is a cast iron LS6 head that was, used in the LQ4, 6.0L engine with both cast iron block and heads. They are a copy of the LS6, 15 degree head with cathedral ports. SS/AS is a difficult class because they also allow splayed valve heads.

05-18-2016, 07:54 PM	#4
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,044 Likes: 712 Liked 1,582 Times in 582 Posts	Re: LS3 Head Mark is correct. There is a cast iron LS6 head that was, used in the LQ4, 6.0L engine with both cast iron block and heads. They are a copy of the LS6, 15 degree head with cathedral ports. SS/AS is a difficult class because they also allow splayed valve heads.