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Old 06-13-2016, 12:10 AM   #29
TJ's Chevy
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Join Date: Mar 2013
Location: Southern Oregon
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Re: Newbie thinking about diving into a '65 GMC 1000

I'd bet money that's a 230 or 250. Engine numbers will be on the lower side of the Block near the starter.

If the side covers are 4 inches tall it's a 230 or 250.

6 inches tall it's a 292.

Dished pistons. 250

Flat top pistons. 230 Easiest way to tell.
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