LS9 C3 swap

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Nov 20, 2018 | 10:03 PM

Chrp 3rd

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Staging Lane

Joined: Sep 2016

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LS9 C3 swap

Hey Guys. Just looking for some opinions. I’m installing and LS9 into my 74 C3. I have a complete LS9 and T56 magnum. I’m wondering on what to do about engine harness and such. Should I run the

Chevrolet Performance 19369382 Details kit

or is it easier to get a custom harness built and go to drive by cable? What’s everyone’s thoughts ? Any advice / help is appreciated

thanks.

Nov 21, 2018 | 12:17 PM

Jimbo1367

TECH Senior Member

Joined: Jul 2009

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I’d call John at www.speartech.com and get exactly what you want.

Nov 23, 2018 | 01:13 PM

Pocket

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From: NC

Custom harness will always fit better than an off-the-shelf version

FWIW, you'll need to go with an aftermarket controller to use DBC. All gen IV 58x engines (anything 08+) are DBW only with a factory ECM. There are work arounds such as the ligenfelter box, but nothing will directly switch