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Old 04-17-2011, 04:21 PM   #1
MP33
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Join Date: Feb 2004
Location: Central Wisconsin
Posts: 153
Brake backing plate interchange???

I also posted this on the 67-72 board:

I'm installing a 71-72 rearend in my 63 C-10



Need to know if the 79 C-10 backing plates that I have will work to replace the rusted/shot 71-72 backing plates. I just have the backing plates on the 79 rearend, no drums,shoes or anything else. How do I determine if they are 2" like my 71-72 or the heavy duty brakes? I doesn't matter to me if they are the heavy duty or 2" but I need to know what to buy tomorrow.

Update: I measured from the axle face(Where the drum mounts) to the back of the backing plate and the 71-72 is 3.375" and the 79 is 3.75"

I do have a 64-70 12 bolt with complete brakes and that one measures within a 1/16" of the 71-72. could I use those backing plates and brake guts from the 64-70 rearend and just get new 71-72 5 lug drums???

Last edited by MP33; 04-17-2011 at 04:22 PM.
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Old 04-18-2011, 12:03 AM   #2
Captainfab
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Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
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Re: Brake backing plate interchange???

If you have the '79 backing plates, I would use those and upgrade to the better 2-1/2" wide brakes in the rear. You need to buy new drums and shoes regardless, the only extra cost will be 2 new hardware kits.

But if that won't work for you, then yes you can use the '64-'70 backing plates and the internal parts with new '71-'72 5 lug drums.
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