If you have drilled and grooved disc's, they are definitely noisy. If you have 14" tires you can't use the 11 3/4 discs from the Cordoba which I use on my 71 Cuda with 15" tires.
Tony, yes, my Wilwood discs are the drilled/slotted ones. The previous owner even bought Wilwood’s “street” pads at their tech line’s suggestion but they made no difference in reducing the noise.