I put this brake system on my '69 about 3 years ago. I had stock front discs and rear drums. I can confirm that the front width did not change. On the rear, the disc was about 1/4" wider than the drum.
Yes I have 69 style disc brakes on my 68 with one piston calipers. I thought they are called.. X2 then.
Yes I have it over the CPP 13" brake kit.
Thanks for your answer I feel confidend about my wheel choice now that I read from your experience. Also Driverz inc told me it should be the right wheel choice.
I hope the brake kit will be solid and good quality
Camaro 1968, propane 327ci, Big Brake, Hotchkis, T56