68 Big Block Leaf Spring

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Mar 13, 2024 | 05:59 PM

Brian Freeman

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From: Mooresville, North Carolina

68 Big Block Leaf Spring

427/390 car - TH400 trans.

What was the standard leaf spring when new - 7-Leaf or 9-Leaf? Various research provides different answers.
I'm thinking the 9-Leaf GM part number 3977579.

Thanks

Mar 13, 2024 | 06:08 PM

robertea

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From: Chapin SC 29036

The Standard rear spring was a nine leaf spring and the heavy duty F41 was a seven leaf spring.

Mar 13, 2024 | 07:55 PM

Nowhere Man

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From: Sitting in his Nowhere land Hanover Pa

2024 C2 of the Year Finalist - Unmodified

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I am fairly certain the F41 7 leaf spring was only available with the solid lifter engines

Mar 15, 2024 | 11:36 AM

Procrastination Racing

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From: Ocala FL

Quote:

Originally Posted by Nowhere Man

I am fairly certain the F41 7 leaf spring was only available with the solid lifter engines

Yes.

Mar 15, 2024 | 11:44 AM

Brian Freeman

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From: Mooresville, North Carolina

Thanks for the info gents - picture is much more clear. For a 9-leaf spring would appear from my research that EATON Detroit Spring is the closest one to original as you can get -- is that the consensus of the C3 community who've tackled that project?

Thanks again...

Mar 15, 2024 | 12:28 PM

Bikespace

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From: Virginia

For originality, read @interpon's thread on the 7-leaf Eaton spring:
https://www.corvetteforum.com/forums...af-spring.html

For driveability, consider a low-arch VanSteel composite spring.

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