For my other drivers, I have used the NAPA brake parts with success. Doing my 67 GT 500 now, looking for decent quality brakes and hardware to be driven, not judged for correctness. Already have the original calipers restored by Goldline Brakes, new rear wheel cylinders from Branda, as well as a set of NOS rear drums. Just need front pads, rear shoes and rear hardware.
I did my GT500 a couple of years ago and picked up pads and shoes from Cobra Automotive. I'm using their High Performance Street and Autocross Carbon Kevlar Compound 201-D11R4S 11" pads and 201-169R4S 10"x 2-1/2" shoes. I'm very happy with the performance and haven't had any issues. Please note that these are not the full competition pads and shoes. Those would be a big mistake on the street. Hope this helps.
I have a new set (for 2 drums) of 2 1/2 stock shoes like used on 67 Shelby (not 65 or 66) . 50.00 shipped.PM if interested.