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ZZ6 Crate engine on C3

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Old Mar 31, 2021 | 09:02 PM
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Default ZZ6 Crate engine on C3

Hello everyone.
I'm thinking of dropping a ZZ6 crate engine in my 1976 C3 Any thoughts?? or any modifications i should know about?

thanks
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Old Mar 31, 2021 | 09:24 PM
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There was just a thread on the EFI version of this, here:

https://www.corvetteforum.com/forums...e-in-a-c3.html

I think you'll need to replace the intake manifold to make it fit under a stock hood, even with the stock air cleaner, and especially if you want to reuse your Q-Jet.

Please post some photos of your ride!

Last edited by Bikespace; Mar 31, 2021 at 09:24 PM.
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Old Mar 31, 2021 | 09:29 PM
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Thank you for the response. I also read that the balancer or pulley might interfere with the chassis cross member ??
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Old Mar 31, 2021 | 09:49 PM
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Originally Posted by Kingtony80
Thank you for the response. I also read that the balancer or pulley might interfere with the chassis cross member ??
That I don't know the answer to. When I looked into putting a ZZ6 into my 80, I figured my best bet was to buy a ZZ6 short block, and add AFR heads, a low intake manifold (either for a Holley Sniper EFI system, or my stock Q-Jet), and use the stock accessories. On my car with no A/C and no power steering, that's just the water pump and alternator.
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Old Apr 1, 2021 | 06:26 AM
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You mentioned without Power steering. is that going to be an issue also in the C3 ?
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Old Apr 1, 2021 | 09:20 AM
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Originally Posted by Kingtony80
You mentioned without Power steering. is that going to be an issue also in the C3 ?
I chose to eliminate stock power steering in both of my C3s (manual in one, and Borgeson in the other), but there are plenty of C3s that have no issues.

I only mention this to point out that my need for a serpentine drive setup on a ZZ6 is very different than yours. I am sure you can get the power steering pump to fit and work, but I can't even begin to suggest how to do it.
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Old Apr 1, 2021 | 01:14 PM
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A couple of threads with good info....
https://www.corvetteforum.com/forums...e-in-a-c3.html
https://www.corvetteforum.com/forums...-question.html

The ZZ6 engine with Serpentine setup fits pretty well overall and only needs a couple of tweaks.
  • The intake manifold on the carburetor version is a bit high for the base model hood. Even the ZZ6 EFI version needed a shorter air filter or drop air cleaner setup.
  • The serpentine setup fits except for the idler wheel that I just turn around (had to grind a bit of one end to make it fit). Some folks said that they just removed it all together. Obviously needed a new belt length.

Let us know what other info that you would like

Cheers,
Richard

Last edited by Kidster71; Apr 1, 2021 at 01:16 PM.
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Old Apr 4, 2021 | 08:02 PM
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Thanks Richard much appreciated ,the picture is a great help .i wil post pictures once im done.
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