LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

Project LT3 officially starting!!!!!!!

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Old Jul 3, 2013 | 09:33 PM
  #1  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
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Project LT3 officially starting!!!!!!!

Just a couple of hours ago, I purchased a good running 1994 Camaro Z28 for $600!!!!!!! Has 145k on it. Was in a wreck and totaled. Guy's son was fooling around and showing off. Burning out and such. Ended up power sliding (driver side door) into a telephone pole, breaking the telephone pole in half!!!!!!! Son lived, but was pretty bad off. Drive-Train is in PERFECT condition. Even has disc brakes. Interior is a 6/10. Exterior isn't too bad, but the driver side is HORRIBLE!!! So I shall swap over the drivetrain, interior, and anything else that will swap. Then, junking the car with my current 3rd gen drivetrain to make some money back. WOOOOOOOT!!!!!!!!!!! They even threw in the Hypertech Power Programmer III 345752 and some other stuff too!!!

I have bookmarked and read lots of LT1 swap threads. Only thing I'm really worried about is the wiring. I've read that it's only like 10 wires to splice together but it's a bit complicating so I will go with an open mind and PREPARED!!!
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Old Jul 6, 2013 | 10:15 AM
  #2  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Hey peeps, I've been reading a lot of swap threads lately. I'm wondering if I take the next week off from work, could I get this completed? I'm über excited to get started but know not to rush things. A lot of the threads are helpful, yet confusing. Like,

1) swapping in an LT from TBI will need new fuel fitting and hoses and such...could I just use all of that from my donor car?

2) swapping in 4th gen disk brakes will need new brake lines...can't I use the donor cars brake lines?

3) do I have to cut up the harness THAT much if I plan on using the 4th gen dash and interior?? Like, the speedometer and gauges should be fine, right?

It's like, lots of these threads are very informative...but are kind of directed at people that do not have the whole car to pull from. And I understand most of them don't. Anyone here use a donor car for swapping??
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Old Jul 6, 2013 | 10:48 PM
  #3  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Anyone?
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Old Jul 7, 2013 | 05:08 PM
  #4  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Anyone at all? Not even a moderator? Where's five7kid when you need em lol
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Old Jul 7, 2013 | 07:37 PM
  #5  
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From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
Re: Project LT3 officially starting!!!!!!!

https://www.thirdgen.org/forums/ltx-...s-ls1-t56.html

It is a ls1 swap, but since he had a complete donor car and used the dash just like you intend on, quite a large bit of what this guy has done should be very helpfull and apply to your project as well.
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Old Jul 7, 2013 | 09:26 PM
  #6  
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Car: 1990 RS
Engine: LS1
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Re: Project LT3 officially starting!!!!!!!

Originally Posted by jahblah

1) swapping in an LT from TBI will need new fuel fitting and hoses and such...could I just use all of that from my donor car?

2) swapping in 4th gen disk brakes will need new brake lines...can't I use the donor cars brake lines?

3) do I have to cut up the harness THAT much if I plan on using the 4th gen dash and interior?? Like, the speedometer and gauges should be fine, right?

It's like, lots of these threads are very informative...but are kind of directed at people that do not have the whole car to pull from. And I understand most of them don't. Anyone here use a donor car for swapping??
I used a donor car for my LS1 swap and it helped out a ton for most of the little parts.
1. I know people have used LS fuel lines, but not sure on the LT1. For about $100 you can buy or make the lines yourself with -an fittings. Here is a post by ghettocruiser on here about how he used LS1 lines, but chopped the front part. https://www.thirdgen.org/forums/post...246-post2.html

2. Are you talking about the rear disc brakes? If so the 4th gen rear is wider , but you may be able to use your stock lines depending on the year. I used one stock line from an LS rear and bent up a new line for the other on my dads swap. Came out very nice.

3. I have not done the interior swap so I can't speak to this.

4. Wiring is not that hard if you take your time and follow the instructions on here and other sites.
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Old Jul 8, 2013 | 02:10 AM
  #7  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Originally Posted by 25th327RS
https://www.thirdgen.org/forums/ltx-...s-ls1-t56.html

It is a ls1 swap, but since he had a complete donor car and used the dash just like you intend on, quite a large bit of what this guy has done should be very helpfull and apply to your project as well.
THANKS!!! that thread is very informative.

Originally Posted by rickyzZ28
I used a donor car for my LS1 swap and it helped out a ton for most of the little parts.
1. I know people have used LS fuel lines, but not sure on the LT1. For about $100 you can buy or make the lines yourself with -an fittings. Here is a post by ghettocruiser on here about how he used LS1 lines, but chopped the front part. https://www.thirdgen.org/forums/post...246-post2.html

2. Are you talking about the rear disc brakes? If so the 4th gen rear is wider , but you may be able to use your stock lines depending on the year. I used one stock line from an LS rear and bent up a new line for the other on my dads swap. Came out very nice.

3. I have not done the interior swap so I can't speak to this.

4. Wiring is not that hard if you take your time and follow the instructions on here and other sites.
Okay, cool. I'm hoping I could maybe use the LT1 lines if need be. Not really looking to throw money outside of what I already have. And yes, the rear disc brakes. I know the rear is wider. No biggie. My car is a 91 RS with drums and the rear is coming out of my 94 z28 with discs. I am going to swap over the brake booster and master cylinder, so anything else needed in the swap over can be carried over if it can be used. I just would like to know if i will be needing to purchase things before I get to them. I know I must order the appropriate fuel pump and such. Not using the donor cars pump. That would be a Homer Simpson's "dope!!!!" move lol

Last edited by jahblah; Jul 8, 2013 at 02:34 AM.
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Old Jul 8, 2013 | 05:45 PM
  #8  
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Car: 82 Berlinetta/57 Bel Air
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Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally Posted by jahblah
Where's five7kid when you need em lol
Trying to figure out what a "LT3" is.
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Old Jul 8, 2013 | 09:51 PM
  #9  
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Originally Posted by five7kid
Trying to figure out what a "LT3" is.
LOL!!!!!!!!!!!!! It's an LT1 in a 3rd gen..Idk why I called it that lol seemed cool at first. I like naming projects.
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Old Jul 9, 2013 | 06:15 PM
  #10  
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Car: 91 Trans Am
Re: Project LT3 officially starting!!!!!!!

Originally Posted by jahblah
Hey peeps, I've been reading a lot of swap threads lately. I'm wondering if I take the next week off from work, could I get this completed? I'm über excited to get started but know not to rush things. A lot of the threads are helpful, yet confusing. Like,

1) swapping in an LT from TBI will need new fuel fitting and hoses and such...could I just use all of that from my donor car?

2) swapping in 4th gen disk brakes will need new brake lines...can't I use the donor cars brake lines?

3) do I have to cut up the harness THAT much if I plan on using the 4th gen dash and interior?? Like, the speedometer and gauges should be fine, right?

It's like, lots of these threads are very informative...but are kind of directed at people that do not have the whole car to pull from. And I understand most of them don't. Anyone here use a donor car for swapping??
1) With a few bends, yes. Easier to make new lines from the framerail to the fuel rail and upgrade the pump

2) See #1. FWIW, late 3rd gens use the same fittings as 4th gens, so hooking the 4th gen rear axle line to the 3rd gen chassis fitting requires nothing. LT1 rear disk brakes are identical to late 3rd gen disk brakes. The front brakes will follow the LS1 brake upgrade route but with a different bracket

3) If you use everything, then the only changes will be exterior lights
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Old Jul 9, 2013 | 10:31 PM
  #11  
jahblah's Avatar
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Joined: Sep 2011
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: Project LT3 officially starting!!!!!!!

Originally Posted by Pocket
1) With a few bends, yes. Easier to make new lines from the framerail to the fuel rail and upgrade the pump

2) See #1. FWIW, late 3rd gens use the same fittings as 4th gens, so hooking the 4th gen rear axle line to the 3rd gen chassis fitting requires nothing. LT1 rear disk brakes are identical to late 3rd gen disk brakes. The front brakes will follow the LS1 brake upgrade route but with a different bracket

3) If you use everything, then the only changes will be exterior lights
AWESOME!!!!! I have seen your very knowledgeable threads and posts about these swaps. I was even in the middle of PM'ing you yesterday but never finished. Your guidance is a must lol I've read that the 4th gen PS lines could be made to fit through bending, but were too short to just plug and play. Did you use the B-Body LT1 lines?
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