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Frame Shortening Q's

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by realsquash, Jul 14, 2000.

  1. realsquash

    realsquash 1/2 ton status

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    Frame Shortening Q\'s

    Hi all. I have a 77 GMC (yes, a pickup) longbox that I want to convert to a short-box wheelbase this winter and add a 4-link/coil spring setup front and rear. My question is how to go about shortening the frame? Will the frame ever be strong enough for hard wheeling? I would be stiffening the frame up with some additional/replacement crossmembers at the same time.

    Sorry for the pickup content, but pickup guys and K5 guys can help each other!

    Thanks!
    Andy
    http://www.trailrunners4x4.org/users/realsquash
    77 GMC, 4-spd/ORD doubler/NP205, 525HP EFI 454, 35s, etc

    Squash
     
  2. chevy4x4

    chevy4x4 1/2 ton status

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    Re: Frame Shortening Q\'s

    I'have never shortened a frame in my life so i am not really sure. You probably cut the piece out from where you want and weld the rest together. I think most people cut out from behind the cab. I think if you re enforce it well enough you can go wheeling hard. But i may be wrong about everything i said.

    <font color=red>Chevy4x4<font color=red>[​IMG]
    http://fourbyfour.coloradok5.com
     
  3. Bigd

    Bigd 1/2 ton status

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    Re: Frame Shortening Q\'s

    I've seen this done before.Thay removed a piece from between the cab and rear wheels,welded back too gether then welded plates over the three sides of the frame.It looked plenty strong probably stronger then the stock frame.But if you can't weld good have someone that can do it.
     
  4. James90

    James90 1/2 ton status

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    Re: Frame Shortening Q\'s

    could you box in a pic-up frame with no porb?

    [​IMG]Go prepared

    I have a Shotgun a Rifle and a 4WD(K5) and Country Boy Can Survive!!!!
     
  5. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Re: Frame Shortening Q\'s

    I would keep the wheelbase and cut it off at the rear spring hanger. That gives you the best of both worlds. For strength I would box the rear of the frame and make a strong rear bumper that doubles as a crossmember. While you are at it brace the frame to the bumper to form a triangle, similar to ORD's brace for the front. that would be super stout. Jim.

    BigJBear '80 GMC
    http://www.bigjbear.coloradok5.com
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Re: Frame Shortening Q\'s

    Yeah I like the Bobed Idea Big J said. Would be much less work. Only downside would be break over would be better on a shortbed. Toyota trucks do this all the time. Even the bronco crews are starting to do it. I wish it was an easy do on a K5 and I would have done it. I'm always dragging the rear. Unfortunatly on a K5 your looking at relocating the tank and hard top not fitting.
    If you still feel you want the short bed I would see about locating a shortbed frame and just swaping the parts over. you could pick up a frame for $150-200 easy if not less. you might even get lucky and find one with the same tranny and cas you have and score the rear driveshaft. If you bed is in good shape you might talk to the yard about trading your bed for a short style and frame.


    Diging it in the dirt with my K5's
    Grim-Reaper
    http://grimsk5s.coloradok5.com/
     
  7. realsquash

    realsquash 1/2 ton status

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    Re: Frame Shortening Q\'s

    I'm actually thinking of a short-box WB and a step-side box for additional "tree clearance". Swapping all of my parts to a short-WB frame, well that would be a lot of work. I've got a lot of custom things on my truck now, and removeing the bed and whacking the frame should only take a weekend at most.

    I've got too much stuff to move over to another frame to make it worthwhile.

    I do like the ORD crossmember-strong bumpers. Anyone got pix?

    Thanks,


    Squash
    http://www.trailrunners4x4.org/users/realsquash
     

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