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Re: Front disc replacements 72 C10
Agree with the above.
The nice thing about the stock rotors...the bottom of that groove in the middle of the braking surface corresponds to the minimum thickness allowed for use. You will find that measurement is stamped into the rotor hub as well. When that groove disappears, the rotor is worn out.
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1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor. 
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