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Group: Administrators
Last Active: 9 hours ago
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The picture of your timing cover is misleading as that cover does look like the ‘small’ water pump cover. But if the new pump you have has a smaller bolt pattern, then you will need a pump for a 1955-1964 application. Be aware that there are two pilot sizes; 5/8” and ¾” so be sure to get the water pump with the correct pilot size. The 1963-64 pickup and truck engines did use the 3/4" pilot size originally but I now find them interspersed on other year engines simply due to the various engine swaps that have taken place.
  Lorena, Texas (South of Waco)
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Group: Forum Members
Last Active: 9 Years Ago
Posts: 21,
Visits: 72
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The pump that doesn't fit is smaller than the one that came off. So i think its the other way around. Was sent a 239 pump instead of the larger item.
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