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This is a complete bolt in kit designed to work on 1960s and 1970s Ford medium duty F600- and likely F750- trucks that gives you a firewall mounted Super Duty power brake booster and master cylinder. This does away with the slave system and under mountd booster. This kit installs in about an hour and requires no cutting or permanent modification. It works with your existing brake pedal.

There are mounting specs and more pictures here:

www.battlebornbrakes.com/f600
 
Master Cylinder Options
You can chose between eitehr a 1.375" bore or a 1.5" bore master cylinder. Your truck has fairly large whele cylinders and I recommend you go with the 1.5" bore master if your current slave cylinder bolts directly to the brake pedal, or 1.375" bore if you have a lever assembly inside your firewall (see the gallery page above for reference)
 
 
This setup puts out about 1600 psi as well as a large amount of fluid and should be a good match for medium duty drum brakes. This brake booster is a whopping 11" dual diaphragm. That's about as big as they get. With medium duty applications, valve cover clearance is not an isuse.
 
Included parts with this kit:
Firewall to SD booster bracket, painted black
Super Duty Brake Booster 1999-2004 style (Motorcraft 5C7Z2005A or equivalent)
Super Duty Master Cylinder (Motorcaft 5C3Z2140MA is 1.375" and 5C3Z2140FA is 1.5" bore)
Custom steel bushing designed to mate SD booster eyelet to factory bake pedal
High quality grade 8 hardware for entire install
Flare adapter fittings- to connect standard 7/16" inverted flare fittings to the master cylinder (common on 1/4" lines)
Flare plugs- for the unnecesssary ports on the MC
 
These brackets are designed, laser cut, and formed right here in the USA. The parts supplied with them are top quality