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Well, they were LB9 castings that had a little work to take the larger springs, 3 angle valve job and larger valve seat for the intake (1.94 over the 1.84 stocker) as well as they were rebuilt with new teflon valve seals and brass valve guides. I gasket matched them with a little grinding work, and thats about it. I tried to get them as close to the World 305 heads. I was gunna eventualy really work on the intake port and see what kinda power I could have pulled..but oh well. Last I heard, the 305 is out and in went in a 383....
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2/20/2013: They Day the ****s Stopped
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