<font color="red"> mr70 </font> I am with you! Okay I will list the std steel wheels and codes only with sizes and applications for the disc brake equipped 68-70 Novas & 68-69 Camaros below. ALL Chevrolet cars in 1967 with disc brakes received rally wheels with the flat cap that said DISC BRAKES on them. Rally wheels were not available on drum brake cars until 1968 and that is when Chevrolet went to the "derby hat" style center cap and it did not designate drum or disc brakes.
<font color="blue">camarojoe </font>, I have never seen a manual disc brake Camaro until 1970 but not sure if they were available on the Novas in 1970. Disc brakes automatically required the J50 power booster on all 67-69 Camaros and 67-69 Novas. There are a couple of disc brake non-SS 69 Camaros around here and both are 350 cars. If you take the total production of SS and Z28 plus a guesstimate of 500 COPO Camaros including the ZL1's that gives you an approx total of 57,000 Camaros with disc brakes in 69. Chevrolet production totals show a little over 67,000 Camaros were equipped the J52 option so that leaves around 10,000 base Camaros equipped with power disc brakes. Not a lot compared to the number of cars built. Also the 7" wide wheel did not come out until 1969 and those were limited to SS & COPO models on the Camaro and SS models on the Nova that same year.
Std steel wheel applications for disc brakes:
XF 14 x 6
68 Camaro all with disc brakes
68 Chevy II all SS and all with disc brakes
69 Camaro all with disc brakes except SS & COPO
69-70 Nova all with disc brakes except SS, and optional wheel on drum brakes in 69.
FC 14 x 6
68-69 Camaro all except disc brakes
Not used on the Chevy II/Nova
XT 14 x 7
69 Camaro SS & COPO with disc brakes
69 Nova SS with disc brakes
70 Nova SS & COPO with disc brakes
Thanks to Alan Colvin for helping out.
I hope this clears things up........... RatPack............