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Old 03-27-2012, 12:22 AM
White85Camaro White85Camaro is offline
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400 4 bolt main?

So I've posted an ad in my city looking to see if I can find another 400 block that will be usable for a 406 build. I've got a reply from someone with a block that still has the original heads, cam, intake and rotating assembly. It apparently has been sitting in warm, dry storage for 20+ years. The casting number is 3951511. When I look it up it shows, 70-73 4 bolt main. I know it's been said that the 4 bolt mains are weaker. Seeing how I'd like to build a street motor with limited strip use. Would this be suffice? Would putting ARP main caps on it make a difference at all? Or would it just be in my best interest to stick with a 2 bolt doing the ARP mains?
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