The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Out of the Ditch = The Rebuild Begins ('72 GMC)

slikside · 10-07-2015, 11:15 AM

I would say that rotor is more than likely original. That groove corresponds to the minimum thickness required, which is stamped onto the hub there somewhere. These rotors may have been available as NOS or something for a while, but long ago they went to a flat surface with no groove. All my recollection, anyway...could be wrong.

10-07-2015, 11:15 AM	#119
slikside Registered User Join Date: Jun 2010 Location: San Diego Co. Posts: 1,145	Re: Out of the Ditch = The Rebuild Begins ('72 GMC) I would say that rotor is more than likely original. That groove corresponds to the minimum thickness required, which is stamped onto the hub there somewhere. These rotors may have been available as NOS or something for a while, but long ago they went to a flat surface with no groove. All my recollection, anyway...could be wrong. __________________ 1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, all stock, Survivor.