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    Results 1 to 8 of 8
    1. #1
      Join Date
      Mar 2005
      Location
      Wisconsin
      Posts
      208
      Country Flag: United States

      LT4 Wiring harnes

      Looking for some input on the best place to buy a ECM and wiring harness for my LT4 crate engine. GM is out of stock countrywide on these, with no ETA?? That being said, I was wanting to do the GMPP kit as it has everything...gas pedal, O2 sensors, ECM, Harness with fuel controller. TIA for any input/advice.

      Used to be known as classiccamaro


    2. #2
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,975
      Country Flag: United States
      Quote Originally Posted by DKz Garage View Post
      Looking for some input on the best place to buy a ECM and wiring harness for my LT4 crate engine. GM is out of stock countrywide on these, with no ETA?? That being said, I was wanting to do the GMPP kit as it has everything...gas pedal, O2 sensors, ECM, Harness with fuel controller. TIA for any input/advice.
      Speartech is a good, reputable option.

      Also, Holley has a new LT4 accessory drive system that packages much better than the OEM accessories.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
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      I deliver what EFI promises.
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      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    3. #3
      Join Date
      Apr 2012
      Location
      Woodstock, IL
      Posts
      2,410
      Country Flag: United States
      GM's ETA last I checked, was mid march.

      Speartech is the only other good option as Andrew stated, but they're 6-8 weeks usually.

      -Dale
      SchwartzPerformance
      The leader in bolt-in muscle car chassis
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    4. #4
      Join Date
      Mar 2005
      Location
      Wisconsin
      Posts
      208
      Country Flag: United States
      Quote Originally Posted by andrewb70 View Post
      Speartech is a good, reputable option.

      Also, Holley has a new LT4 accessory drive system that packages much better than the OEM accessories.

      Andrew
      Quote Originally Posted by Schwartz Performance View Post
      GM's ETA last I checked, was mid march.

      Speartech is the only other good option as Andrew stated, but they're 6-8 weeks usually.

      -Dale
      Thanks for the input guys.... Speartech seems to be a good option. I saw the Holley Drive kit....looks like a nice set-up.
      Used to be known as classiccamaro

    5. #5
      Join Date
      Mar 2005
      Location
      Wisconsin
      Posts
      208
      Country Flag: United States
      Has anyone used Current Performance Wiring for their LS / LT swap? If so, thoughts??
      Used to be known as classiccamaro

    6. #6
      Join Date
      Sep 2010
      Location
      Orange County, CA
      Posts
      665
      Check out psiconversion.com it looks like they have the harness, not sure if its a complete kit or not, but worth a call.

    7. #7
      Join Date
      Mar 2005
      Location
      Wisconsin
      Posts
      208
      Country Flag: United States
      Quote Originally Posted by Schwartz Performance View Post
      GM's ETA last I checked, was mid march.

      Speartech is the only other good option as Andrew stated, but they're 6-8 weeks usually.

      -Dale
      Thanks Dale..... I see that you are a Holley Dealer...do you stock any of their parts?? Oil pan/engine mounts for LT4??

      Dave
      Used to be known as classiccamaro

    8. #8
      Join Date
      Dec 2008
      Location
      Detroit
      Posts
      2,585
      Country Flag: United States
      Quote Originally Posted by DKz Garage View Post
      Has anyone used Current Performance Wiring for their LS / LT swap? If so, thoughts??

      I used Current Performance when I first did my LS swap. Great quality and I would definitely consider them when doing a swap. The only reason I don't have it now is I switched to Holley.
      Big dreams, small pockets....

      Chris--
      '72 Cutlass S LSA/T56 Magnum
      Bowler Performance, Rushforth Wheels, ATS, Holley EFI, KORE3, Ridetech

      Project Motor City Madness





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