Rear disc Brakes on 8 3/4

Brakes for your Classic Mopar

  1. varlo

    varlo Joe- Long Island, Oakdale

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    i would definitely be down for a set if you can figure out an ebrake solution.
     
  2. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    I have three sets sitting in boxes if anyone is interested.
     
  3. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    thought i should copy and paste for others that may be interested.
     
  4. 65BarracudaRon

    65BarracudaRon Member

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    Just checking to make sure I am getting the correct rotors to work with your brackets. Information I am finding shows that the front Mustang rotors are 10.865 and the rear rotors are 10.51. Should I keep looking?
     
  5. Buschi340

    Buschi340 Well-Known Member

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    I stuck a bit at this point
    Caliper is behind the axle in 3 or 9 o clock position and is hitting the leave spring with the spring of the emergency brake.
     
  6. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    Here's the picture he sent me. Looks like when I install my rear end I will have the same issue. Taking mine setup all apart to re-examine everything
     

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  7. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    I will have to double check mine but I believe that caliper is on the wrong side
     
  8. mguner

    mguner How many is too many?

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    I went with Intrepid front rotors, metric GM calipers and Speedway brackets with popular GM front hoses....
     
  9. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    The calipers are marked left and right so the way they are orientated with the mounting bracket, the spring will be in contact with the rear springs. Buschi sent me a couple of pics on how he had to redrill mounting holes. I'll post them shortly
     
  10. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    Here's the pics Buschi sent me after he re-drilled one of the brackets so there would be no interference with the leaf springs and calipers
     

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  11. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    I have been using the same template since the beginning. This is the first time I have run into this problem after over 100 sets. Yes the calipers are on correct like mine.
    I am confused why it is not right on his setup. Something has to be different
     
  12. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    When assembled, mine would have the same problem as he did with the caliper spring hitting the leaf spring. If calipers were swapped from side to side, then the bleeder would be on the bottom. If the springs were relocated, then there would be no problem. However, looks like he did not relocate his springs and neither will I be doing it. Maybe you can post a close-up pic of how yours are orientated for both brackets and caliper.
     
  13. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    I looked closer at mine today and since I relocated the springs I can see that they could hit the spring. My setup would not but it was close. I will now modify the jig so it is corrected for future buyers.
    Thanks for bringing this up as nobody has said anything was wrong or had any issues.
     
  14. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    Yes, they would have hit the springs on his and will on mine unless I re-drill mine. I assume we're talking about the bracket that is bolted to the axle studs? What's the chance of getting a pair of the corrected brackets as I am not ready to install the rear end?
     
  15. Buschi340

    Buschi340 Well-Known Member

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    hm, a nice new pair of brackets.. :)

    well, I have another Point while we are here. The bracket A which is the one bolted on the axle. It is Plasma cutted and I assume you drilled the holes first and cutted later? I am asking because the bracket is a little bent I saw as i was drilling new holes. Guess the heat from the Plasma cutter made that.
    And I also had to open a bit the holes for the screws to Mount the other bracket for the caliper.
     
  16. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    I pm'd you about the brackets.


    it is cut out with a torch now to ease some of the cost. There is possible warpage. I used to machine every single piece but it was starting to drive up the cost too much so i changed gears many many brackets ago. If the torch is set perfectly i can get a hacksaw looking cut.
     
  17. Punisher66j

    Punisher66j Dart Swinger

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    Are you still selling these?
     
  18. dodgedifferent2

    dodgedifferent2 Well-Known Member

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    Yes i still sell these. Now with a few extra modifications for the problem that was just brought to my attention.
     
  19. moparmat2000

    moparmat2000 FABO Gold Member FABO Gold Member

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    Will this kit fit an 8&1/4 rear ? The backing plates for an 8&1/4 drum brake setup are the same bolt pattern as an 8&3/4.
     
  20. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    I just looked at my 8.25 to compare it to my 8.75. i don't believe it will fit the 8.25; I'd probably go with the Hrand Cherokee disc conversion on the 8.25 (which is what I'm doing with this axle.
     
  21. Sedanman

    Sedanman 67-9 Valiant specialist FABO Gold Member

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    The 8 1/4 has 4 bolt backing plates and 8 3/4 and up have 5
     
  22. moparmat2000

    moparmat2000 FABO Gold Member FABO Gold Member

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    My 10" drum backing plates off a 7&1/4 bolted right up to an 8&3/4" no problem. It looks like the 8&1/4 is the same pattern and spacing though it only uses 4 bolts instead of 5.

    If so this kit may be able to be used on an 8&1/4.

    Anybody have a set of 7&1/4 BBP or 8&3/4 backing plates they can test fit on an 8&1/4 ?

    I am prob gonna go with an 8&1/4 for now as i dont have all the pieces for an 8&3/4. But if its something thats swappable.
     
  23. 65 Dartman

    65 Dartman FABO Gold Member FABO Gold Member

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    Matt - I've got some 8.75 plates I can check on the 8.25. I will also check the fit of this disc brake set up and see what happens. I am waiting on a set of revised brackets for my 8.75 so the calipers won't be touching the springs
     
  24. moparmat2000

    moparmat2000 FABO Gold Member FABO Gold Member

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    Ok cool. Thanks Don.
     
  25. Buschi340

    Buschi340 Well-Known Member

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    can i get a revised set as well ? to a US address where i am the first 2 weeks in may.
     
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