I may have just been burned. I picked up a set of disc brakes at a swap meet that were being sold as "65-66 GT disc brakes and spindles" I did not have any way of checking the parts numbers, they looked correct, and I'm probably way too trusting. I went to install them this afternoon on my '65 hardtop. Before mounting them on the control arms, I decided to test fit my new 65-66 front disc brake hoses. Well, it turns out the the threaded hole in the four disc calipers is way bigger than my brake lines threaded nipple. After noticing this, I didn't even attempt to mount them on the control arms. I'm hoping I didn't buy a set of spindles and brakes for some other Ford product. The casting numbers on the spindles is C60A-3107Fand C60A-3108F. The number cast into the calipers is E71941. If anyone knows what these numbers are please let me know. But, I'm thinking I may not want to know.....