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1-Ton Dually Axle......a TRUE bolt-in!?!?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Greg72, Oct 18, 2001.

  1. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Heard that a 14 bolt FF from a 1-Ton dually is a "true" bolt-in, with correct pad spacing, shock mounts, etc.....for a '69 - '72 K5?

    I know that the U-joint will need that special adapter 1350-1310 style thing, but is the rest really THAT easy?

    -Greg72
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>No, no 14 bolt is a total bolt in. The shock tabs have to be moved. Stay away fromt dually rears because they are narrower than the non dually ones I think. I have a 1 ton 14ff and I did the shock tabs in my driveway
     
  3. 1HIHUM

    1HIHUM 1/2 ton status

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    Actually, I think the one under my truck was a true bolt in. The shock mounts are in the correct locations, and look original. Same for the spring pads.

    God bless those who in the name of freedom and justice, have, and will make the ultimate sacrafice! These words are in your honor.
     
  4. POFF

    POFF 1/2 ton status

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    All 69-72 turcks have 40" spring pad centers on the rear axle. Beginning in '73 the 1/2 and 3/4 tons have 42 1/2" spring pad centers but the 1 tons were, and I think still are, 40". A single tire 1 ton axle is a bolt up, except the shock mounts need to be moved. The 1 ton axles have 40" spring centers. The 3/4 tons have 42 1/2" spring pad centers. 14 bolt duelly axles have the backing plate flange too far in-board to run single tires. I have a word document with more info, if you want I can email it to you.

    Never said I could spell!
    '70 K-20 San Diego, CA
     
  5. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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  6. BARRAZA

    BARRAZA 1/2 ton status

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    I have been looking to make the 14 ff swap on my K10 and found a C20 in the junkyard this weekend that had the correct spring pad spacing. Not sure what year it was,but the VIN was 1GCGC23T4CS176727. I know the year is in there somewhere. Was also a crewcab if that makes any difference. Best bet is to always measure. BTW - has anyone swaped the spring hangers instead of moved the mounts?
     

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