Just a general comment - the disc brake kit and caliper size are restricted by the wheels you run - they must clear the inside of the wheels. Keep that in mind as you research your question.

 

You'll need a checkbook: Rear Disc Brake Disk Conversion Kit 240Z 260Z 280Z

 

I am using this StopTech setup from ZCar Garage as part of my ground up restoration of my '72 Z:

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You can order it with or without the extra Emergency brake rear caliper.

 

The kit from Motorsport Auto is direct bolt on with no modifications to the car as well as use and function of the stock parking brake cable. Nice adapter brackets, parking brake brackets and all hardware. I've had these on my car for years with no issues. Motorsport Auto - The Z Store - Stage 1 Rear Disc Brake Conversion Kit, 70-78 240Z-260Z-280Z

 

General remark: the wheels you use will determine the size of the disc brake kit and calipers you can use. Remember that as you look for answers to your inquiry.

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