The Master Power Brake disc conversion kit (part number DBF39) is a fantastic truly bolt on kit. The quality is very high and the ease of install is so simple. One note to be aware of:
If you are going to use the 15 x 6 style wheels (part number W184) you will need to shave the hub slightly and a little of the caliper casting otherwise your wheels will sit correctly. I have only had experience with the style wheel 15x6 (4”bs).
Both products are great.