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Old 12-14-2017, 11:51 PM   #6
Steeveedee
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Join Date: Jan 2013
Location: Simi Valley, CA
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Re: One for the small block decoders

Quote:
Originally Posted by crazyjeenyus View Post
On closer look, the 9 looks like it could be an 8 or a 3. That confuses things a little more.
The suffix code search only gives us two different years as a possibility:

'70 or '79

The casting number search however provides data that is more plausible:

'68 - 327
'69-'79 - 350

So, if we ignore the suffix code (TBC) the possibilities are:

If the number is an 8:

1968 327 block

1978 350 block

If the number is a 3:

1973 350 block

This frustrates things a little but I know from firsthand experience that it is possible to have a block that has conflicting information stamped/cast into it. The original 283 block that came with my '67 custom has a suffix code that only matches up with a 307. In C-10's 307's first came in 1968 and they had breathers in the valve covers. So when all else fails, open it up, measure the bore and stroke and do the math.

In your case large journal 327's and 350's are the same block so with the exception of the crankshaft (which could have easily been replaced) its not really possible to know for sure.
Yup. One of my younger sisters bought a '66 Malibu with a "4 Bolt Main 350" replacement engine. When I went to rebuild it, I found a small journal 327. Sellers can lie, or maybe just not really know what they have.
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