Can someone take a quick measurment.

[lyrikz]

I have a 71 swb. I need the measurement from the trailing arm crossmember top hump to the bottom of the floor. I need to raise the top of that crossmember up a bit, and need to know the distance. I cant move my cab at the moment or i would slap it on and take the measurement... anyone??

This is what im trying to solve. I dont want to buy a new unit, i know i can make this work just fine... Thanks for the help guys.