line lock on 73 duster ?

if I remember correctly there are two ways to wire in a line lock
you can use it to lock out the rear, this means the rear brakes will NOT engage when you get on the brake pedal
this is nice because you can do a burn out and roll out of it by leaning of off the brakes
in this case, you turn the line lock on BEFORE you get on the brake

the other way, you install the line lock on the front brake
in this case you get on the brake, THEN set the line lock (locking up the front) and when you get off the brakes the fronts are still locked so you can roast the hides
down side of this is, there is no easing off the brakes when you let off the line lock