Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - #906 Casting Vortec Heads
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Old 05-18-2008, 07:38 AM
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for a fullsize truck you use for hauling and towing once in a while and pulling our boat, use 906s or 062s what ever you can get, no diffrence in your case. How can you tell if they are GM factory heads or aftermarket cast iron vortecs ? well GM vortecs will be from 1996 to 1999 and be numbereded 12558062 10239906 and prob say GM on them and have the saw tooth marks cast into one end of each head. others will prob chime on. do a google search on vortec heads
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