The caliper will not mount on a pre 03 blaster axle carrier. They are totally different. You need a banshee, warrior or 03+ carrier from a blaster. Now there is another catch when swapping the carrier.The axle from the Banshee, warrior, and 03+ blaster is held to the axle carrier on the right side with the disc brake hub. On the older style blaster hub there is a big ring that holds the axle to the carrier and the brake disc floats. Of course they both use big nuts on the left side. So you need a Carrier, axle, and disc brake hub from one of the three bikes i mentioned, plus the caliper and master cylinder. You could try to cut the bracket off your carrier and fabricate but believe me it will be harder then you think. The eisiest way to go to rear hydraulic brakes is to just buy the trenga rear brake kit. It is about $375( I've found them on ebay for about half that). In the long run it will save you time, money,and head ache. Chasing parts gets stressful, and fabricating doesn't always turn out the way you want.