The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 5.3 ls out of a 03 tahoe z71 with 706 heads for boost

6.0 1955 · 01-21-2012, 02:28 PM

Be sure and open up the top ring to around .025-.028 to allow for expansion. The 706 heads cc is around 59-60. A set of 241's or even better yet the 243's will lower compression more with larger combustion chamber and will flow better as well. But if low boost is all you want to run bolt the 5.3 in hook it up and have fun. Good luck with the build.
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01-21-2012, 02:28 PM	#3
6.0 1955 Registered User Join Date: Jul 2011 Location: Ashland, KY Posts: 91	Re: 5.3 ls out of a 03 tahoe z71 with 706 heads for boost Be sure and open up the top ring to around .025-.028 to allow for expansion. The 706 heads cc is around 59-60. A set of 241's or even better yet the 243's will lower compression more with larger combustion chamber and will flow better as well. But if low boost is all you want to run bolt the 5.3 in hook it up and have fun. Good luck with the build. Posted via Mobile Device