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Old 04-17-2003, 05:53 AM
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Question 400 chevy blocks

will someone with 400 (sbc) knowledge school me on which years the 400sb was built with more nickel or in your opinion which years where the 400 blocks built the best any casting #s would be appreciated. THANKS FOR YOUR TIME
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Old 04-17-2003, 06:26 AM
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Good luck finding a high nickel block. High nickel 350s are rare enough as it is. Of course if you do find one GRAB IT!

If you need casting numbers to check look in the knowledge base
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Old 01-21-2006, 08:58 PM
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400

i have a supercharged 400 sbc with a 6-71 blower. 400's were at there best in the early 70,s they stopped making them around 76
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Old 01-21-2006, 09:21 PM
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400 SBC's were made from model years 1970 to 1980. They appeared in the big cars like Impala, Caprice, Monte Carlo, El Camino, vans and trucks.
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Old 01-22-2006, 04:54 AM
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4 bolt blocks ran 70 - 72. Mine was cast 5/oct/70 - 2 days before my 9th birthday.
Most 4 bolt 350's I see have core shift, the 2 bolts generally have less. I've now seen a few 400 4 bolts with minimal core shift including mine.
The worst 350's I've seen had 010 cast above the pan rail as well as behind the timing cover. Shift was fore/aft as well as side 2 side.
Is this due to high nickel content moving around during casting? Any ideas?
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Old 01-22-2006, 06:38 AM
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Yall do realize this post is almost 3 years old?
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Old 01-23-2006, 01:06 AM
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Hey, it's still 2002 in OZ and 1946 in New Zeeland.
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