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Hates: Liver. Loves: Diesel
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5,659 Posts
Doesn't make sense. Double check that number.

170 means that its 76 or later
33 doesn't mean anything from what I know. Are you sure its not 83?
2 is 49-state emissions
2 is chevy division
4 is automatic transmission.

Those are also not set in stone. The Rochester plant followed those numbering rules pretty closely, but nothing absolute. They broke their own rules.
 

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Hates: Liver. Loves: Diesel
Joined
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5,659 Posts
Maybe someone else has a better reference on hand, but the sources I have don't say anything about a 33 year code. I believe that it says 33... Rochester did some weird things with those numbers.
 
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