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77 K10 LS Swap

Discussion in 'Engine Swaps (Gas) LS, Vortec, LT1 , etc.' started by Madhorn, Jul 19, 2018.

  1. Madhorn

    Madhorn Full Access Member

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    Truck Year:
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    Engine Size:
    5.3/NV4500/NP205/4:56 gear/35in tires
    I am currently in the midst of a 5.3 swap into my 77 K10. The 5.3 is mated to a NV4500 trans and NP205 transfer case using Advance Adapters along with a manual clutch linkage/pedal. Here is the problem, the stock 5.3 drivers side exhaust manifold points directly at the clutch Zbar/linkage. Does anyone know what exhaust manifold will work in the application? Thanks
     
  2. Madhorn

    Madhorn Full Access Member

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    5.3/NV4500/NP205/4:56 gear/35in tires
    IMG_1107.jpg This is where I am today, a year into this project.
    Once it was torn down and cab gutted, it needed floor pans and many patches in the fire wall and a lot of cleaning. All new wiring harness from American Auto Wire, dash and heater/AC boxes refurbished. There have been so many little things that have been replaced, fixed or modified to make this swap work I can't even begin to list them all. I am glad I took a lot of pics. When I started this I thought I would be posting daily pics and updates, but as anyone with kids will tell you, life happens.
     
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  3. Camar068

    Camar068 Supporting Member Supporting Member

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    10 yrs Air Force
    lol my truck was where your at about 3 months ago. I've got an auto trans, sorry I can't help. A suggestion, make sure you get all your grounds and your O2 sensors in the right bank (purple and purple/white) is the only difference between the two lol.
     
  4. Madhorn

    Madhorn Full Access Member

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    After some internet research I think I have found 3 possibilities. Two from Patriot (H8076 and H8014), then one from Schoenfeld (1302LS1). Both Patriot headers are shorties and the Schoenfeld is a long tube header. At this point I think the Schoenfeld is the best option, I did see one post last night where someone had used this header in roughly the same application and claimed he had no clearance issues.
     
  5. Crispy

    Crispy Full Access Member

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    Engine Size:
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  6. Madhorn

    Madhorn Full Access Member

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    IMG_1187 (1).jpg IMG_1188 (1).jpg IMG_1193 (1).jpg
    Made some modifications to the trans tunnel today. Also had to make a couple mods to the transfer case shift handle.
     
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  7. Madhorn

    Madhorn Full Access Member

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    Crispy, Just looked at the Speed Engineering headers. They look like they will work. I will call them Monday and ask, two sets I looked at 25-1025 and 25-1026 both had a note that said will not fit 4x4. Thanks for the info.
     
  8. dvdswan

    dvdswan Full Access Member

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    Did you have to notch the 4wd shifter hole to have it shift into 4HI?
     
  9. Madhorn

    Madhorn Full Access Member

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    dvdswan: I ended up putting a couple bends in the handle. Also had to relocate the eyelet on the bottom down 1 inch and in towards the trans 1/2 inch.

    Transfercase shifter 7.21.18.jpg

    Transfercase shifter II 7.21.18.jpg

    Trans and T-case Shifters 7.21.18.jpg
     
  10. Madhorn

    Madhorn Full Access Member

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    As far as exhaust goes. I think I will end up using the Schoenfeld long tube header 1302ls1 since I have seen where they worked for others doing the same project. The Speed ENG header 25-1025 looks like it will work but no one can say that it will.
     
  11. Crispy

    Crispy Full Access Member

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    They all say that for some reason but in this thread there is verification of fitment.
    http://www.gmsquarebody.com/threads/1979-k20-5-3-swap.21002/page-10#post-423620
     
  12. Madhorn

    Madhorn Full Access Member

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    Crispy: Thanks for the link. In that application they are using a 4L80 trans. I am trying to use an NV4500 with manual clutch linkage. The clutch linkage is my clearance problem. The drivers side rear exhaust tube must exit the head an turn straight down for at least 15 inches to clear the clutch linkage. I am not saying the Speed ENG header will not work, but just I have not seen where anyone has tried it. Believe me, I would love use a set of stainless headers. BTW. I e-mailed Speed ENG, have not heard back from them.
     
  13. dvdswan

    dvdswan Full Access Member

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    Have you looked at the stock Camaro or Corvette LS manifolds?
     
  14. Madhorn

    Madhorn Full Access Member

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    A 97 to 2000 Corvette should work. Not sure about the Camaro, have heard they work fine with auto trans and standards with hydraulic clutch. Here are some pics of the stock drivers side 5.3 manifold.

    Drivers Side Maniflod II.jpg

    Drivers Side Manifold III.jpg

    Drivers Side Manifold.jpg
     
  15. dvdswan

    dvdswan Full Access Member

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    When I did my exhaust on my toy I had to modify the manifold to fit the exhaust.

    16222173_large.jpg 16222175_large.jpg

    16228214_large.jpg 16235531_large.jpg

    You need to preheat the manifold when you actually go to weld it. Certainly not the best way IMO but it was my best option for fitment. Not very pretty either. After it was all welded I did heat wrap it.
     

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