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Old 09-21-2021, 04:25 PM
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Dick Boneske Dick Boneske is offline
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Default '64 Grand Prix Tri-Power Waterneck

I have a few odd watenecks that I believe are for '64 Big Pontiacs. The casting number is 9776545.

The shape is nearly identical to the '66 GTO and big Pontiac waternecks, but with a different casting number.

Can someone confirm?

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  #2  
Old 09-21-2021, 08:16 PM
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Here is what it looks like.
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Old 09-22-2021, 09:46 AM
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Dick,
1966 parts book confirms that part # is a 1964 full size tri-power water neck.

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Old 09-22-2021, 10:49 AM
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Here’s progress on the Tri-Power.

It’s going to go on a ‘64 Grand Prix. The block is a ‘64 421code 45B, which is the 421 HO, factory rated at 370 Hp. Heads are ‘64 421 HO/‘64 GTO casting #9770716.

The short block is a Dan Whitmore build.
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Last edited by Dick Boneske; 09-22-2021 at 11:08 AM.
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