need a measurement on f150

i need to know how far up the DJM arm goes when it lays frame.

so when the truck is laid out how far is it from the frame to the top of the control arm.

i need to know because i am trying to figure out if i need to make a notch in the frame to clear the bag. the frame might lay before the bag touches.

i could probubly figure it out but i would have to reassamble everything..