My guess is that until the pads and rotors "wear in" together, you'll have that noise and vibration. I've been seeking a matched pair of late-B drilled/slotted front rotors and Lincoln rears as specified for the Scarebird rear disc conversion. I can't get any one of those eBay sellers to respond to my queries regarding them.

Just because you're paranoid, it doesn't mean they are not out to get you. WANT TO BUY- Looking for a CD by 'The Sub-Mersians' entitled "Raw Love Songs From my Garage To Your Bedroom". Also, any of the various surf-revival compilation albums this band has contributed to.