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03-17-2015 07:17 PM #1
CHR Junior sMember
- Join Date
- Mar 2015
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- New Orleans
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400 cubic inch small block crankshaft
I am trying to identify the crankshaft that came in a 400 small block engine. The casting numbers don't match in any book i have. the numbers are as follows:
8180
GM2n
3861528C or 3861628C the 5 number isn't perfect
Does anybody have any info on this crankshaft? I appreciate the help.
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03-17-2015 08:56 PM #2
CHR Member/Contributor
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- Mar 2005
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- Tigard
- Car Year, Make, Model: 63 Nova SS
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- 2,584
The only stock GM crank that ever came in 1970-1980 400 engines has casting number 3951529. It’s a one-off, i.e., 3.75” stroke with 2.65 main bearings and is externally balanced. You may have a replacement item?"Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil
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