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Old 11-22-2008, 02:51 AM   #2
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: sbc vortec heads 062 casting vs. 906 casting

It was originally written in Chevy High Performance magazine that the 906 castings had a restrictive hardened exhaust seat, but that was latter corrected. The heads I've seen personally, I couldn't see any difference between the two castings.
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