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#16
11-09-2006, 03:23 PM
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Re: 1966 Chevelle
If I recall correctly, back in the day, there was a service
bulletin issued by GM to all dealers alerting them to the fact that some of the 360hp engines used 4-bolt main blocks. I believe that this was done to avoid piston dome confusion ( collision ) with the oval port heads. I guess in a round about way I am saying that I believe both blocks were used across the 360hp application.
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