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Old 08-25-2004, 09:50 AM
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sbc 400

i have a sbc 400 that has been bored .060 over and plan to run it on the street not as a daily driver but just to play with should i worry about it being .060 over or just build it and drive it i want to have at least 400 hp and about the same or more tq should i try and find another block or should i be ok with this one .

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Old 08-25-2004, 10:56 AM
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.060 over is thin for a serious 400, but there are more than a few being run as street engines. I would go with your block. Just have it magnafluxed (checked for cracks) and realize that it has some limitations. No big hose kits, etc.
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Old 08-25-2004, 11:05 AM
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thanks for the input i just got it back from the machine shop it was magnfluxed and it checked out ok the machinist said that i should use a 5.7 rod to take the side load off of the cylinder walls has any one heard of this thanks
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Old 08-25-2004, 11:32 AM
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Yes. I build all my 400's with 5.7 or 6" rods. Just watch the top of the rod bolt, it has to be ground for clearance (cam) with some cam combos. If you use a 350 type GM rod.
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Old 02-15-2007, 10:25 AM
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400 cid

At 0.060 over the cooling system is another key point. I would go with an electric water pump(to keep it in range at idle) and find the biggest aluminum radiator you can find. As for the block, would get it sonic tested for wall-thickness. Also have them check the deck for block to head seal.

Last edited by jimigrem70; 02-15-2007 at 10:28 AM. Reason: more to say
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