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buying a truck from a non truck person

Discussion in 'The Garage' started by 55Willy, Feb 18, 2007.

  1. 55Willy

    55Willy 3/4 ton status

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    found a 76 k20, is it a 44 or a 10 bolt and would it have flat tops?

    4" lift 350-350-203 37's with 4.10's
     
  2. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    flat tops on Dana 44 only. I think the cut off for flat top D44's was '75
     
  3. bigblazer87

    bigblazer87 1/2 ton status

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    It should be a D44 with flat top knuckles, but depending on the history of the truck a different year front axle could have found it's way in there.
     
  4. atho

    atho 1/2 ton status

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    I forget the rule of thumb for D44 vs. 10 bolt placement, but I have seen several 1980 1/2 and 3/4 tons with D44's up front. GM would use whatever they had on hand. Only SUREFIRE way is to go look.
     
  5. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    I have seen flat tops on 10 bolts. A friend of mine had them on a 1987 10 bolt. He bought the truck in stock trim so I doubt someone swapped them. Go look under the truck
     
  6. 79k20350

    79k20350 3/4 ton status

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    :confused::confused::confused: Id be willing to bet someone broke a knuckle or you didnt know what you were looking at. No stock 10 bolts came with flat tops
     
  7. thatK30guy

    thatK30guy 1 ton status Premium Member

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    '76 will have the flat tops. This year is the "first design" axle. The "second design" started in mid-'70.

    10 bolts are "second design" also. You won't see them in '76 unless it was swapped in.

    Another 'plus' is the D44 in the K20's have 1/2" thick tubes pressed into the pumpkin and outer C's.
     
  8. 55Willy

    55Willy 3/4 ton status

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    so it'll be worth the $1000 to go check it out.
     
  9. bigblazer87

    bigblazer87 1/2 ton status

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    If it's in good running condition, most definitely!
     

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