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Re: Chevy Six Cylinder Casting Numbers
Quote:
Originally Posted by Carl Spangler
Greetings
My 1971 C10 (SPID indicates a base engine 250 ci) block has a date code of A 71 (perhaps Jan 7, 1971). The block # is 3994257 which doesn't show up on any of the listed resources. Any idea how I can authenticate this motor #? Oh, it's a Fremont build. thanks JohnG
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Stovebolt forum indicates it's more than likely a 250 cubic inch. The 230 and 250 blocks have the same cylinder dimensions but the cranks are different giving the 250 the larger displacement. Only way to make absolutely sure is to dismantle and check.
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68 GMC 250/3 speed Saginaw p/b p/s
69 Chevy 350/350 currently in pieces still lookin for a cab
06 Trailblazer
I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...
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