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Old 12-12-2011, 09:20 AM   #5
BigBlocksRule
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Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
Re: 86 chevy 4x4 400 engine

^ correct, unless somebody bought an aftermarket with the extra weight on the inside...rare, but it's happened. If you see the offset/cutout, it's either a 400 or a 383.
Good luck, hope it's a 400, they can be beasts!
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