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'81 burb...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jersey, Aug 30, 2001.

  1. Jersey

    Jersey 1/2 ton status

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    \'81 burb...

    I don't know too much about older burbs but was wondering if someone could help me out. Posted the same ? on the burb board but not to much going on over there. I'm looking at buying a '81 4x4 burb, 3/4 ton, 305(?), th400, 208, 10bolt front, 14 rear w/4:10's. Does anyone know if the front and rear axles are the same width? reason being...my rear 10 bolt is ready to blow in my '91K5 and i want to replace it with either a 12bolt or 14 for better strenth and also i want the rear to be as wide as the front. figure i'll buy this burb (rotted and chopped bad, but drivetrain good), tear it down for parts, and use both front and rear axles instaed of tring to find a 12 or 14 that matches the width and 3.42's of my 10 bolt front that's currently in my truck. Also, not worried about moving perches or shock mounts. Any help would be appreciated.

    - Jersey

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>click here for pics</a>
     
  2. DesertDueler

    DesertDueler 1/2 ton status

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    Re: \'81 burb...

    14 bolts out of a 3/4 ton are 67 inches wide. 10 bolt 6 lug design are 67.5 inches. 10 bolt 8 lug design are 69.5 inches. So the front will still be two inches wider than the front when you convert it to 8 lug. The actual housings are the same size, but the hubs are longer on the 8 lug.

    86 Jimmy 4"lift 35"MTRs Other cars 69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  3. Jersey

    Jersey 1/2 ton status

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    Re: \'81 burb...

    So basically, if i swapped both of the burbs axles in, i'd still have a 2.5" difference. ok. Then can i use the 8 lug spindles, hubs &amp; rotors, backing plates off of the burb and convert my 10bolt/6 lug? kinda like they did in the tech section? or is that what you meant, that if i tried to do the 6 to 8 lug conversion with the burb parts, it would push me out again another couple inches wider than my rear? Thanks for the help.

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>click here for pics</a>
     
  4. DesertDueler

    DesertDueler 1/2 ton status

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    Re: \'81 burb...

    You can swap spindles, hubs and rotors in like the tech article. It would push you out another 2 inches if you use the stock rear end. If you use thr 14 bolt in the burb then it will only be off by 2.5 inches. Hope you understand.
    Dan

    86 Jimmy 4"lift 35"MTRs Other cars 69Firebird w/525 hp,and 70GTO live in PHX,AZ&lt;a target="_blank" href=http://www.geocities.com/modifierperformance&gt;My vehicles&lt;/a&gt;



    <P ID="edit"><FONT class="small">Edited by DesertDueler on 08/30/01 07:33 PM.</FONT></P>
     
  5. Jersey

    Jersey 1/2 ton status

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    Re: \'81 burb...

    yup. think i got it into my thick scull finally. If i put the 14 bolt in and do the 6 to 8 lug swap for the front, i'll still be 2.5 inches offset and....if i use both axles from the suburban, i'll still be 2.5 inches off. Either way the front and rear track wont line up. Guess i'll just have to look for a 12 bolt/6lug out of a van. Heard they're 2-3 inches wider than 10bolt K5 rears, just have to move perches, shock mounts and use a tricky ujoint. Don't know what year, make or model vans to look for, or if they even made them with 6 lug, 3.42's, but i guess i'll find out soon. Just trying to avoid spacers. Doesn't make sense to me to spend $150-$200 on a rear and then another $140 on wheel spacers (which TO ME, isn't the "right" way) when i can spend $150-$200 on a rear that is stronger than my 10bolt AND tracks the same as my front. And these are just MY opinions...not trying to offend anyone. Thanks for all your help Dueler.

    - Jersey

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>click here for pics</a>
     
  6. ArrowheadK5

    ArrowheadK5 1/2 ton status

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    Re: \'81 burb...

    Just curious, why do you care if the front wheels are 2.5" farther apart?

    Four wheel drive, four wheel expenses...
     
  7. Jersey

    Jersey 1/2 ton status

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    Re: \'81 burb...

    one more thing...put this in your signiture to create the link to your site....

    url=http://www.geocities.com/modifierperformance]My vehicles[/url]

    Just put one [ in front of the first letter (u) and it'll work fine. Just copy and paste the whole line. only way i can pay you back for the help over the line! thanks again.

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>click here for pics</a>
     
  8. Jersey

    Jersey 1/2 ton status

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    Re: \'81 burb...

    for a few reasons i guess. one, i would think the a$$ end would try to follow ruts on the snow/mud that the fronts have made and it would slop back and forth. and two, I'd like to be able to put 12.50's on it and not have them look swallowed in the rear, as opposed to filling the front. Also takes away the "driving sideways" look as you're going down the highway. Basically personal preferrence i guess, just figured i need to change my rear soon anyway, might as well see if i can kill 2 birds...

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>click here for pics</a>
     
  9. DesertDueler

    DesertDueler 1/2 ton status

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    Re: \'81 burb...

    No problem Jersey. Let me know if you need anymore help.
    Dan

    86 Jimmy 4"lift 35"MTRs Other cars 69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     

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