hope im in the right section..i have a 79 f250 with some baffling results. when i bought the truck it had very bad breaks the peddle would just go to the floor.so after new engine trans lift.new booster master cylinder complete front calipers .rear brakes electric vacuum pump with 18psi bled 10 times and a gallon of brake fluid. still the same result the pedal just goes to the floor but has very little braking . i am at my wits end.any help would be great.thanx shawn

 

any 1..............................

 

Is the prop valves safety switch tripped ? In the front of it, is the pin sticking out of it ?

 

where is it located?

 

still have no idea where it is.lol