Rear end swap

Discussion in 'Garage' started by mbradley026, Sep 14, 2018 at 12:25 AM.

  1. mbradley026

    mbradley026 Junior Member

    Age:
    55
    Posts:
    2
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    0
    Joined:
    Sep 10, 2018
    Location:
    Oregon
    First Name:
    Mark
    Truck Year:
    1970
    Truck Model:
    C20
    Engine Size:
    5.7
    Has anyone placed a late model rear end into a 1970 C20 truck. If so how difficult was it. Or would it be best to modify the original rear end? I have a 1970 C20 and would like to update w a late model engine and transmission.


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  2. bucket

    bucket Super Moderator Staff Member

    Age:
    36
    Posts:
    16,402
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    2,014
    Joined:
    Aug 3, 2010
    Location:
    Usually not in Ohio
    First Name:
    Andy
    Truck Year:
    '77, '78, '79, '84, '88
    Truck Model:
    K5 thru K30
    Engine Size:
    350-454
    The rear axles used in the older C20's are good ones. If you want a newer unit for the disc brakes, you can use basically any late model rear axle from a GM or Dodge through around '10. Bolt patterns started changing after that. But of course, newer axles tend to be wider and you will need to relocate the spring perches and shock mounts.
     

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