Thread: Pre 85 Block, 87+ TPI, what heads ?
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Old 12-31-2008, 05:12 PM
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MarkM66 MarkM66 is offline
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I believe there are only two types of intake manifold bolt pattens. Vortec, and non vortec.

I belive vortec started in '95.

Valve cover bolt holes vary, but if you're getting aftermarket heads, it irrelavant.
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