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Old 10-31-2017, 01:45 PM   #12
bruceman1968
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Join Date: Oct 2009
Location: Tampa Bay
Posts: 1,549
Re: Help me decode my motor!

I have a book from MSA-1 by Mark S Allen for small block Chevy suffix codes. I just now looked for the MSA-1 website and can't find it anymore. I don't know why, but it looks like you can still find the book on amazon. Jegs and Summitt used to carry it. They still might. There's also a MSA-1 book for Big Blocks. One for I-6 Chevy's as well as one for Buick, Pontiac, Ford etc. These are small books you can carry in a shirt pocket. Sometimes there are errors. Always best to check a couple of sources. GM documentation is the best source but it is expensive and difficult to find. There are several other books for Chevy engine codes that you can find with a quick search.
Here is a link to the Z28 website that has a pretty good list of suffix codes as well as other Chevy info. This link goes to the page for your 68, 327 info.
http://www.nastyz28.com/gm-chevy-cod...-suffix-10.php

I also found another code that fits your application. YL

If you want to find the casting date code on your 307, here is a pic that will help.
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