This auction is for a pair of drum to disc brake conversion brackets which will convert your 1940 to 54 full size Pontiac to front disc brakes.   This kit will do what others will not; fit inside a stock 14 drum rim.  These pieces are made in the USA, laser cut from 1/4" cold rolled steel for excellent tolerance control.  No machine work whatsoever is required on your spindle; it does not even need to be removed.    This conversion uses the following components:

Modified Sprinter rotors (stock 5 on 5" bolt pattern) 

GM full size calipers and pads 

Some of our customers have used the existing single chamber master cylinder with good effect.  We sell a bracket to mount the Wilwood remote dual master that will fit.