Broke 2 of 3 high steer arm studs on passenger side knuckle. When heated knuckle around studs to remove them cooked the upper ball joint. Turns out the ball joint had been misinstalled a decade ago or so and as it was in crooked when being pressed out the knuckle FAILED. My knuckle is now 1" shorter overall then it should be.
The knuckle is also apparently one that just barely exists. It's only found on 1978-1979 Ford F150's ordered with the SUPERCAB option. According to pirate only 7000 units total produced. So it's looking like either a dana 60, Reid knuckles, or convert to chevy flat tops.