My dads 69 Charger R/T vacuum line to the brake cylinder thing snapped. Now he wants to convert the front to discs. he asked me to figure out what size rotors it needs. It has stock brakes and wheels. Anybody know how to measure drum brake rotors?

 

Do you mean a drum, or a rotor? 2 different thing...

Measure it. Side to side. Goes for both of them.


Also micrometer them if they are used..

 

Here, read this. http://www.moparaction.com/tech/archive/disc-main.html This is the most complete compilation of B-body, disc brake swap info I've ever found. Good luck!