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Old 03-09-2026, 02:00 PM
Terry M. Hunt Terry M. Hunt is offline
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Default 66 GTO water pump pulley

Finding a profusion of confusing and often conflicting info on what is correct for certain applications. My car is 1966 GTO with Tripower, 4 speed, power steering, air conditioning. What is the correct water pump pulley for this combo? What is the diameter? What is the part number? Info on line states 7 inch and also 8 inch with various part number. Somebody must know the definitive answer. Appreciate any assistance on this.

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Old 03-09-2026, 06:43 PM
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OG68 OG68 is offline
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Its depends whether you have air conditioning or not.

From the '68 MPC
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Old 03-09-2026, 08:53 PM
Terry M. Hunt Terry M. Hunt is offline
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Default 66 GTO water pump pulley

Yes, car has a/c. Not able to enlarge your photos enough to read the text.

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Old 03-10-2026, 01:26 AM
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Old 03-10-2026, 12:44 PM
Terry M. Hunt Terry M. Hunt is offline
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Default 66 GTO water pump pulley

Hey, now I can read the text and diagrams. 7 inch two groove pulley part number 9782679. Thanks for your help on this.

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