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11.75 disc brake questions

wagonman

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Deming New Mexico
Howdy All, I picked up 2 11.75 set ups with everything from the spindles out. What I have on the car now is 10 inch discs from IIRC a 71-72 Satty wagon. They work fine but if Ican go to the bigger discs why not. So I tore one side down to check fitment. The rotors from the donor have a bigger bearing, the spindle is taller @ 5.1/4 and the brackets are wider @ the bolt holes to spindle mount. What do I have here?

IMG_0511.JPG IMG_0512.JPG IMG_0513.JPG
 
The caliper adapter in 2nd picture on the left looks like it's for 11.75 rotor. Not sure about others.
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calp.JPG
2disco.jpg
 
How thick are the rotors? C body rotors are about 1.25, B body rotors are about 1"...
 
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