Ref the disc , to the best of my knowledge all blackbirds 97-07 used the same disc and pads. Are you looking for 4 pots or 6 pots. If your looking at 4 pots I wouldn't go with the 40mm brembos, to much force on to smaller area. Blackbird are a lot heavyer than 748/996 , the bigger the hole centra the better up to a point. After talk to my mate he thinks it would be possible to make the brackets with 1 hole slotted to accept 60mm to 64mm calipers. As long as the offset was the same. What you think??