Daniel, the picture in YOUR LINK
misleading. First, it shows a 4 lug rotor which wasn't used on the Camaro. Second it shows only the hub, which isn't correct for that part number. The 5514 (in various part number extensions like BR5514, 5514AX, etc...) is a 1969 and later replacement "one piece" hub and rotor assembly that fits the single piston calipers. The 67-68 Camaro uses a smaller hub because of the 4 piston caliper design and the 5514 won't fit.
However, the 5100, which is also a "one piece" hub and rotor assembly USUALLY
fits the 67-68 Camaro, but because of machining tolorances, not always. I'm running a set of 5100's on my 68 right now and you can see how close the hub comes to rubbing against the caliper (see below). I HAVE had to take new ones back once or twice over the years to exchange them for different ones because one might rub while another one wouldn't. China (where just about EVERYTHING is made now), doesn't have as stringent tolorances as one would hope!
Anyway, the "correct" 2 piece hub and rotor is only available as an assembly and you can't buy just the rotor. At least not right now!