With the exception of the Avanti and some Lark models, it will be necessary
 to install a residual check valve (RCV) in both the front and rear lines!
 This is necessary due to the fact that the master cylinder is mounted below
 the wheel cylinders and calipers. To achieve proper brake pedal travel, and
 over come the tension of the return springs.   The valve residual pressure
 check overcomes the return springs and will keep brake fluid in the wheel
 cylinders/calipers.

For Disk/Drum
2# (blue)RESIDUAL CHECK VALVE IN THE FRONT LINE AND 10# (red) CHECK VALVE 
IN THE REAR LINE

For Drum/Drum
10# RESIDUAL CHECK VALVE IN THE FRONT AND REAR LINE

For Disk/Disk
2# RESIDUAL CHECK VALVE IN THE FRONT AND REAR LINE