69 FACTORY ROTORS

[DONCZ28]

DOES ANY ONE HAVE A PIX  OF AN ORIGINAL 69 FRONT ROTOR.   MY ROTORS HAVE  VARIOUS SIZE HOLES IN THE HUB (OUTSIDE DIAMETER)  NEXT TO THE DISC......I HAVE OWNED THE CAR SINCE 1982......DON....

[Jerry@CHP]

That was for balancing,

Jerry

[DONCZ28]

     JERRY, I HAVE SEEN PICTURES OF REPO'S, THAT CLAIM TO BE MADE FROM AN NOS PART, BUT I DO NOT SEE ANY BALANCE HOLES DRILLED.   DO MOST FACTORY ROTORS HAVE THESE HOLES?  ARE THE REPO'S NOT BALANCED? WAS THE SERVICE PART FROM GM UN BALANCED?........DON

[Dusk Blue Z]

I have both the original rotors on my car, only one has the holes drilled to balance the rotor. I am sure there was a balance spec for the rotors when new, if they were within tolerance no additional machining was needed. Attached is a picture of the paint mark that was only on the rotor without the holes.
Mike