Yes, I've read that, but it doesn't explain the two different center cap Ornaments. One with "Chevrolet Motor Division Disk Brakes" and one with just "Chevrolet Motor Division". If it were true that in 67, if you wanted Rally Wheels you also had to order Disk Brakes, then it would be listed as such on the order form, and I've never seen anything that stipulates this. Of course, the CRG WHEEL REPORT
shows no Rally Wheel available with Drum Brakes, so I guess that's the way it is, but I'm still not totally convinced.