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Thread: lt1 swap into 87 3/4 4x4?

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  1. #1
    Join Date
    Jun 2007
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    4

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    i have a 1987 chevy 3/4 4x4 and want to do a resto mod on it and for the engine transmission i wanted to use an lt1 4l60e or 4l80e combination. i'm trying to find more information on what i'll need to do this swap into my pick up. i've read about guys doing this with 2x4 model trucks similar to mine but nothing thats a 4x4. any help would be appreciated. i'm just trying to do some research before i go ahead and get into this project.

  2. #2
    Join Date
    Jun 2007
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    guess it's kinda a crazy idea huh?

  3. #3
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,540
    Personally, I would not waste the effort with the LT1 engine. That engine was only made for a few years and parts are pricey. Get a Gen3 engine with the newer technology and better fuel mileage. They never put LT1 engines in trucks at the factory so that makes the conversion even more difficult. The newer 5.3/6.0L engines are the way to go and you get a better transmission to go with it.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
    Join Date
    Jun 2007
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    ok, so if i went with a 5.3/6.0L engine, would the motor mounts have to be modified? how hard would it be to come across a vehicle with that engine in that's trashed, how much money ruffly would i be looking at?

  5. #5
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    Price depends on your shopping abilities and what's available in your area. You need to get Gen1 to Gen3 adapters, available on Ebay for $40.

  6. #6
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    Jun 2007
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    ok i'll have to check that out. what about the trans? probably have to get some sort of different crossmember made.

  7. #7
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    the earlier Gen3 4x4 setups are probably going to be your best bet. Check around and see if any of them still have the manual linkage setup.

  8. #8
    Quote Originally Posted by bigredrocket87 View Post
    ok i'll have to check that out. what about the trans? probably have to get some sort of different crossmember made.
    L@@k in the ls conversion forum. "my engine sits 1" back" has some real good info. I just went over a bunch of 4x4 stuff there

  9. #9
    Join Date
    Dec 2007
    Location
    houston
    Posts
    45
    as far as a x-member just make one, its nothing difficult, just get some 1.5" square tubing and go to town. i did it in about an honest 5-10 minutes. even used the factory drilled x-member bolts just so i wouldnt have to drill any more holes in the frame. (im lazy)
    look at my 5.3 silverado folder @
    Putfile - Welcome to my homepage!



    basically its 1 bar per frame rail (which the pictures cuts off/cant see, and the part you can see is welded on top of that. why is one side higher than the other.. dunno, it just works out like that.. the oil pan to the front seteering rod looks good.



    clint
    1987 5.3 4l60e Silverado - daily driver with A/C,P/W,P/L,TILT and HID projectors - also for sale @ $8,500
    A poor man buy's it twice

  10. #10
    Join Date
    Dec 2007
    Location
    houston
    Posts
    45
    as far as the axels, i dont own a 4x4, but make sure the axel comes out of the t-case on the same side as the axel's yoke. other than that its a simple drive shaft issue. have one made to fit.
    1987 5.3 4l60e Silverado - daily driver with A/C,P/W,P/L,TILT and HID projectors - also for sale @ $8,500
    A poor man buy's it twice

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