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Old 05-18-2012, 06:16 AM
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Originally Posted by SoCa06Z
what were thought to be Vortec heads are actually old swirl port heads that aren't worth a damn past 4k RPM.
I was gonna say the end design on the cylinder head didn't look correct and the intake bolts had the 12 bolt pattern and angle not the vortec's 8 bolts.

If you can source some vortec heads that aren't cracked for a good price grab em. I have a set on my 355 in my oldsmobile and love them. What an upgrade from the 441s.
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