I'm just starting to replace the thermostat crossover and I can't believe the crap involved in taking out the 1 hidden bolt....I'd like to meet the engineer who designed this wonderful piece of @#%*. I saw a post from 1 person that looks like a great idea, drilling the bolt from the top and use a torx bit to reverse it out, I hope it works...

 

Just wait until you go to replace the left rear shock.

Here's a 'bitch about the engineer' thread I started.
https://www.ford-trucks.com/forums/7...-engineer.html