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1987 Suburban 350,700r4 & np208 swap in 1984 K10

Discussion in 'Engine & Performance' started by Preston, May 15, 2019 at 1:59 PM.

  1. Preston

    Preston Full Access Member

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    Preston
    Truck Year:
    1983,1984,1985
    Truck Model:
    83 c3500 (3) 84 c10 4x4 85 silverado 68 c10 short bed stepside
    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    okay, I have found (1 1/2 hour away) the motor trans and transfer case out of an 87 suburban to install this engine in my 84 will I need any additional electrical gizmos to make this swap work? Thanks for your help
     
  2. yevgenievich

    yevgenievich Full Access Member

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    5.7
    Do you want tbi, or will be converting to carb? If carb, then just need to add control for torque converter lockup. If tbi, then harness and ecu and fuel
     
  3. Preston

    Preston Full Access Member

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    83 c3500 (3) 84 c10 4x4 85 silverado 68 c10 short bed stepside
    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    I’m not sure which way to go but looks like tbi would not be too difficult to set up, thanks for your help
     
  4. Preston

    Preston Full Access Member

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    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    We are back home with a well spent trip

    1D4D9813-CA5A-4854-8B40-31D6F5AF3769.jpeg

    E042FB8E-3DB9-415D-8BD8-0E7F24F940AD.jpeg

    229D2528-AEFD-4DE2-8977-3D08A705A31E.jpeg
     
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  5. yevgenievich

    yevgenievich Full Access Member

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    If harness complete and have ecu, essentially just putting it all together. Would need to add a fuel tank with fuel pump and fuel injection rated connections/hoses.
     
  6. Preston

    Preston Full Access Member

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    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    Don’t believe I have the ecu, just the harness to the fuse block
     
  7. Preston

    Preston Full Access Member

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    I’m not sure this is a 700r transmission can you help me this was removed from a 1987 Suburban maybe a 3/4 ton the pan looks too small to me might need to take some more pictures thanks
     
  8. Craig 85

    Craig 85 Full Access Member

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    Engine Size:
    454/TH-400/NP205
    [​IMG]
     
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  9. yevgenievich

    yevgenievich Full Access Member

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    Not a 700r4. Maybe th350 or th400.
    Should be th400 if from a 3/4 suburban
     
  10. CSFJ

    CSFJ ----------------- Supporting Member

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    Passenger side of the pan rail looks to be a th350. 700r4's were available in the 3/4 ton pick-ups in '87 along with the th400. Don't know if they made availability of those different for the 'burbs or not, but I guess it's a moot point anyhow as this looks to be a th350.
     
  11. 78C10BigTen

    78C10BigTen Full Access Member

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    350
    No modulator on the pass side. Dont think its a th350
     
  12. 78C10BigTen

    78C10BigTen Full Access Member

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  13. Preston

    Preston Full Access Member

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    Truck Year:
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    Truck Model:
    83 c3500 (3) 84 c10 4x4 85 silverado 68 c10 short bed stepside
    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    I’ll get a better picture tomorrow but there is a modulator valve on the passenger side it’s hiding in the picture, thanks I have to figure how to get it out of the trailer, maybe find a tractor, backhoe or a low limb close, I have a engine lift but not sure it will pick all this up at once.
     
  14. 78C10BigTen

    78C10BigTen Full Access Member

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    Im thinkin th400 then... maybe 700R, idk
     
  15. Craig 85

    Craig 85 Full Access Member

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    It's a TH-400.

    [​IMG]
    [​IMG]
     
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