These instructions are for all A-Body Disc Brake Conversion, from 1962-1976

 

NOTE: DO NOT  I repeat DO NOT USE ANY OTHER PARTS THAN A-BODY FACTORY PARTS EITHER NEW OR OLD!!!

THIS MEANS ONLY A-BODY CALIPERS, ROTORS, PROPORTIONING VALVE OR BEARINGS!!!!!!!!

***** MUST READ *****

You will need the following parts from the A-Body Donor car!!

 

Removal:

  • You will need the following parts from the a-body donor car!!!:
  • Upper Control Arms, from 1973-1975 A-Body, Dart, Duster, Valiant, or Dart Sport.
  • Disc Brake Calipers for A-body car ( single Piston Caliper only )
  • Front Spindles ( Single Piston Caliper ) ** Mark their location (Before you take them off the A-body Donor Car!!) with left front or right front **.
  • Proportioning Valve: You must use the unit, from the A-Body donor Car or buy a new one for a A-body car from MyOldMopars
  • From the A-Body donor car, remove the ( 2 ) lines that are attached to the master cylinder, and use them on your car.
  • Sway Bars, this will not interfere with either the factory or after market SWAY BARS, just weld on the tabs, from the A-Body Donor Car, or the brackets, that came with the after market kit.
  • It is NOT advisable to switch the Caliper from front to rear on the rotor, the Chrysler engineers, found it best to place the caliper in the rear of the the spindle, to aid in heat transfer, and this also helps keep the road grime from entering the piston.
  • 4.5" bolt pattern front Wheels.

NEW or Rebuilt PARTS NEEDED

You Can get the New Parts From MyOldMopars.com

  •  A-Body Donor Rotors or New Rotors for an A-Body Car.
  • New Front Brake Hoses. Order a set for the year of the A-Body Donor Car. disc/drum They are a direct replacement
  • New Brake Pads ( Order make, model and Year, of the A-Body donor car )
  • New Spindle Bearings ( Order, what make, model and Year, of the A-body donor car ).
  • New Front Wheels Bearing Seals for A-Body car
  • New or Rebuilt Master Cylinder, Disc / drum, must use 73-75 A-Body, with or without/ power brakes (Advance Auto Parts)
  • New Cam Kit, and Upper and Lower Control Bushings For the same year as the A-body donor car.
  • New 73-75 A-Body Upper and Lower Ball Joints
  • New Upper A-body A Arm Bump Stops
  • New A-Body Shocks
  • New Brake Fluid

Clean all Reusable Parts!!!

REPEAT!!!

Clean all Reusable Parts!!!

INSTALLATION

  • Remove tension on Torsion Bars, and move the back about 12" towards the rear of the car.
  • Replace ONLY the Upper A-body Control Arms.
  • Replace Front Spindles with donor set, being careful, not to mix up the left and right sides, You    should have already marked with with a "L & R", see above.
  • Install Proportion Valve, in Line
  • Replace New Lower Ball Joint, with new 73-75 A-Body, ( Larger size )
  • Replace New Lower Ball Joint, with new 73-75 A-Body, ( Larger size )
  • Install Rotors, Calipers and New Pads, and New Grease Seal behind the rotors & new bearings,   and put grease on the spindle
  • Replace with new Front Taper Bearings, install cotter pin.
  • Replace with new Front Taper Bearings, install cotter pin.
  • Install New 73-75 A-body Lower Ball Joint and Grease entire front end.Adjust Torsion Bar Adjuster
  • Install new or rebuilt Master Cylinder.
  • Have the front end Aligned
  •  That's it, this would be a nice weekend project.

If you have a small bolt 8 &fraq34; rear end and want to change your bolt pattern from 4" to 4.5" then you can order a set of new Axles from Moser Axles.

      Moser axles will simply bolt in with no Mods. Order some new "Green Bearings from Moser, this will take the place of the Passenger side ADJUSTER.

 

 ****Note: Please take the time to read, and understand the instructions!****

Please follow the instructions as this will make your job a lot easier, safer, and complete.

 

Please inspect the Rear Brakes, Hardware, Hoses, Brake Lines and wheel cylinders. If the parts do not look good then rebuild them or by new parts for an A-Body car from MyOldMopars.com

This is the best time, to completely flush and bleed the entire brake system, until all the rust, and dirt, are flushed out.

Start bleeding the brakes starting with the passengers side rear then drivers rear then passenger side front then divers side front.

Repeat until all rust and bubbles are out of the system. (check the master cylinder and refill as needed).