I had an unfortunate accident of snapping a stud from a 1969 Camaro front disc brake rotor. Does anyone out there know if these are press-in or thread-in? The rotor has an additional set of threaded holes in it which make me wonder if the other pattern which the studs are in are also threaded. Any help will be greatly appreciated.  

Do you know if the rotor/hub is original? Could they have been replaced? Some aftermarket parts may have more than one pattern. In general, all Chevy brakes from that era are pressed in. It being a 69 Camaro, makes me wonder about some trick factory Trans Am parts that ended up on production cars to make the rules. Anyone know of this?  

All wheel studs are pressed in for rotors like yours. just go to any local parts store, tell them you need a wheel stud for a '69 Camaro, then have the old one pressed out and the new one pressed in.

Never heard of screw in studs on the rotors in '69, not even for the Z/28 SCCA racecars.  

Thanks for the info guys.