c4 stuff into c3

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May 1, 2017 | 05:32 PM

vetski179

Thread Starter

Racer

Joined: Aug 2005

Posts: 289

Likes: 64

From: Tacoma Washington

c4 stuff into c3

After 13 hours of grimy, backbreaking work, a guy gave me the entire front cradle (control arms, steering, shocks, etc) and complete rear diff from a c4. A latter c4 with the speed sensors. Unfortunately, my c3 frame is already powder coated and I don't want to re-blast it to get it back to bare frame to weld/cut. Curious what stuff I might use on my 1980 without cutting/welding. I'd hoped to use the plastic spring and would appreciate any other suggestions. Thanks.

May 1, 2017 | 05:41 PM

Dynra Rockets

Burning Brakes

Joined: Oct 2012

Posts: 1,152

Likes: 252

With a welder and a sawsall you can do anything but nothing I am aware of will bolt in. Even the spring is different length and width.

the C4 tubular exhaust manifolds will fit an automatic car but no real performance benefit other than dropping a few pounds.

Last edited by Dynra Rockets; May 1, 2017 at 05:51 PM.

May 1, 2017 | 08:44 PM

Gale Banks 80'

Safety Car

Joined: Nov 2008

Posts: 3,713

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From: Seattle Washington

There is absolutely nothing interchangeable including the spring.

May 1, 2017 | 08:44 PM

terry82

Le Mans Master

Joined: Jul 2000

Posts: 6,663

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From: columbia city in

sell everything and get what fits.

May 1, 2017 | 08:52 PM

ddawson

Le Mans Master

Joined: Mar 2001

Posts: 5,738

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From: Lincoln, CA

Or send your frame out and be converted.

May 1, 2017 | 11:32 PM

The13Bats

Race Director

Joined: Mar 2003

Posts: 11,608

Likes: 780

From: Eustis ( Area 51 Bat Cave ) Fl

If you track down a c3 called hammerhead, that cat thinks outside the box he used c4 suspension on his wild c3, not bolt in but made it happen

May 2, 2017 | 02:10 PM

vetski179

Thread Starter

Racer

Joined: Aug 2005

Posts: 289

Likes: 64

From: Tacoma Washington

thanks

May 2, 2017 | 06:51 PM

69427

Tech Contributor

Joined: Jun 2004

Posts: 20,847

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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.

Quote:

Originally Posted by vetski179

I understand not wanting to cut up a good looking frame. I bought a spare/used frame and cut that up to install my C4 suspension. Lotta work, but worth the effort to get the suspension under my '69. The C4 suspension looks better, handles better, and is lighter weight.

I prefer the strength/affordability of the stock C3 differential, but I did use the C4 batwing on my stock differential for another 20# reduction.