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I don't know what an LQ4 is, but I had my valve covers off today to put on some new shiny ones. Yes they are offset slightly in relationship to pushrod socket to valve stem face.
It's back together so I can't give you the amount of offset.
I'm thinking about putting a set on my lq4, didn't know about interchange
You need standard LS1 rocker arms for your LQ4.
The LS3 and L92 truck engines uses the same offset intake rocker arm and standard straight exhaust rocker arm. The LS7 use a similar setup but the intake rocker more offset, where as the LS1/LS2 are both straight.