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3/4 ton converstion questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rocko, Jul 19, 2001.

  1. rocko

    rocko 1/2 ton status

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    Okay.. I'm working a deal out with Thatk30guy.. I'm trading my 454 engine for a 1-ton rear and 3/4 ton dana 44 8 lug front.
    My questions are..
    1. Which truck should I put them in.. looking for some moral support here.. I have my 76 Blazer w/ dana 44 6lug front and 12 bolt rear.. or my 1983 with 10 bolt's.. My 83 is my daily driver.. so I'm leaning toward's my 76 since it's off-road only truck.. would that be a wise choice?
    2. If I put the new front/rear in my 76.. will the 12bolt and dana 44 fit my 83 in place of those 10 bolts?
    3. What's the part number for the universal joint's for 1/2 ton to 3/4 ton conversion?
    4. Thatk30guy is moving the spring perches in on the One ton rear to match my Blazer.. will I have any problem's with bolting them up? or is it a pretty painless (yeah right) operation?
    Thanks taking the time to read this.. I want to do some research before doing a axles swap...
    You guy's rock !!!!
    Later..
    Rocko.

    A well armed society is a polite society.UPDATED <a target="_blank" href=http://www.rocko.rockcrawler.com>www.rocko.rockcrawler.com</a>
     
  2. J.R.

    J.R. Guest

    i just got done doing the same swap on my 85 k5. it was pretty painless but then i had a shop and a lift that made things a lot easier. do your homework before you start, getting what parts and tools you will need. that will make things a lot easier. and dont be in a big hurry, thats when mistakes and accidents will happen. the u-joint i used is from napa, sorry i cant remember the part number off hand. there are 2 they make for it make sure you get the one that fits your drivshaft and the larger 14bolt. good luck

    BIG BLOCK MAN
    "MORE POWER"!!
     
  3. put em in the 76. leave the 10 bolts in your daily driver- if that's all you're going to do with it, and sell the 44 and 12 bolt.

    when swapping the axles, put the wheels and tires on so you can role them under your rig. have fun!

    <font color=blue>Striving for K5 world dominance</font color=blue>
     
  4. rocko

    rocko 1/2 ton status

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    Oh .. i plan on it..
    Thatk30guy is one hell of a guy... [​IMG].. Hope he enjoy's the 454 as much as I'll enjoy my new axles..
    Thanks for the input so far...


    A well armed society is a polite society.UPDATED <a target="_blank" href=http://www.rocko.rockcrawler.com>www.rocko.rockcrawler.com</a>
     
  5. misfit

    misfit 1/2 ton status

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    napa u-joint #348 for your application.
     
  6. BurbinOR

    BurbinOR 3/4 ton status

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    Put them in your off road truck, where you will need them MORE than on your daily driver 10 bolts...........not that you won't need them eventually on the driver but the off road truck is where you want your peace of mind.

    Yes, the 12 bolt will fit in your 83.............probably if the gearing is the same don't bother with the front as the strength gain is minimal.

    Part number is either 348 Napa or 447 Napa depending on the size of the yoke on the driveshaft of the truck you decide to put the good stuff in..........

    No problem bolting them up if the perch width is moved. Seriously, this is an EASY conversion. Just soak all the bolts with PB Blaster a couple of days before you start and make sure you have plenty of tools and beer.............and help.

    Thatk30guy built my 14 bolt and he is great to do business with. Dang thing looked new when it came out of the coffin (crate) [​IMG]

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.alloffroad.com>www.blazzinor.alloffroad.com</a>
     
  7. rocko

    rocko 1/2 ton status

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    back to the top.. thanks.

    A well armed society is a polite society.UPDATED <a target="_blank" href=http://www.rocko.rockcrawler.com>www.rocko.rockcrawler.com</a>
     
  8. HarryH3

    HarryH3 1 ton status Author

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    It's a pretty easy swap. I jacked up a 3/4-ton '74 and my '75 K5 in an apartment parking lot many years ago and swapped axles between the 2 trucks in about a day. That 14-bolt is HEAVY!!! Everything bolted up pretty easy. If you have rear lift blocks on your K5, you'll need some new u-bolts in the rear to fit around the fatter 14-bolt axe tubes.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  9. rocko

    rocko 1/2 ton status

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    I'm not using rear blocks..I have 4 inch rear springs.. so I guess I'll need U-bolt's anyway? correct?
    If so... where do I get them? who sells them for 3/4 to 1-ton lifts?

    A well armed society is a polite society.UPDATED <a target="_blank" href=http://www.rocko.rockcrawler.com>www.rocko.rockcrawler.com</a>
     
  10. HarryH3

    HarryH3 1 ton status Author

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    Yes, if you don't have the u-bolts from the 14-bolt axle then you'll need to buy some. Look in the yellow pages under Springs. There should be a spring rebuilder in a city the size of Austin. They can make u-bolts in about any size that you want. A 4WD shop should also be able to get u-bolts from any of their lift kit suppliers.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     

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