ls1 swap wiring in 66 impala ss - Impala Tech
Electrical & Wiring Troubleshooting electrical problems

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post #1 of 5 (permalink) Old 08-06-2019, 07:33 AM Thread Starter
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Location: Australia
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ls1 swap wiring in 66 impala ss

hi guys

has anyone wired a ls1 into a 66 impala what's the go have many wires need and what goes were thanks.

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post #2 of 5 (permalink) Old 08-06-2019, 10:23 AM
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You can buy a complete wire harnes for an LS in an older car from GMPP. The alternative is to find a donor car and disassemble the harness to remove the computer controls for items you do not have (such as ASB brakes and Transmission controls) and cut it down to fit the car. This requires taking apart the termination and putting on a new pin on the end of the shorter wire before reassembling it.

Big Dave
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post #3 of 5 (permalink) Old 02-05-2020, 11:30 PM
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I did my 68 by cutting down a stock LS harness, but now there’s a guy named Matt on Facebook at LS harness connection page nice work for a good price and it’s brand new made to your order.
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post #4 of 5 (permalink) Old 02-06-2020, 11:09 AM
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Best bet is to get in touch with Donny Bock from American Auto Wire, they have custom harnesses along with standard.
His e-mail: [email protected] Tell him Paul from winvoices referred you from the Team Impala site, heíll help you out


1966 Impala SS

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post #5 of 5 (permalink) Old 02-20-2020, 09:06 AM
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I went with Holley Terminator X for the 6.0/4l80E swap I'm working on and I'm extremely happy with results. After setting the basic parameters it fired on the first start.

My engine did not have a harness or PCM so it made sense, also I didn't wanna depend on the tuner every time I change something on the engine.
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