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289 or 302 how can you tell

756 Views 7 Replies 5 Participants Last post by  450hp69coupe, 
butchd88
how can you tell a 289 from a 302,other then the water pump outlet being on opposite sides
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Dave
Up until 1970, all the small blocks had the outlet on the passenger side and shared the same pump, D3UZ-8501-A. Going to have to rely on the casting numbers.
Dave
Ford Cooling Systems Mustangs
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Dave
Both should have the 13/16" hex, don't know when Ford went to the 5/8".
Dave
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