I have a 1969 mustang with factory front disk brakes and a 9" rear end with drums. I needed a new brake booster and master cylinder so I pulled them off a 1988 mustang and will be using them according to this guide Fox Mustang Power Brake Booster Install . I was wondering if I could use the proportioning valve off of the 1988 mustang or do I have to buy a brand new aftermarket one?
Thanks
Thanks
