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Old 12-14-2016, 02:07 PM   #1
OrrieG
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Join Date: Jun 2006
Location: Idaho
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Re: Late Model Chevy pickup Engines

Quote:
Originally Posted by Kim57 View Post
The 350 is also an excellent engine and works well also.
And a lot of the truck 350's from 3/4 ton up are 4 bolt main blocks. Unfortunately you cannot tell from the casting numbers, I have a truck block in my Chevelle with the same casting number and 1974 date code (both came out of the 74 donor trucks) as the truck block, truck is 4 bolt, Chevelle 2 bolt. Both trucks were 1/2 tons, I suspect they may have gotten behind on engine production and just tossed in a 4 bolt to keep the line moving.
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