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gchemist · 01-23-2008, 02:20 PM

Yes, the ZZ4 has old style aluminum heads.
You can see the bolt patter really good on this picture.

01-23-2008, 02:20 PM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Chevy SB parts Yes, the ZZ4 has old style aluminum heads. You can see the bolt patter really good on this picture.