Using mustang rotors for 4.5" bc

Stendy said
From a performance stand point, they aren't safe. The bolts that hold the lower balljoint to the spindles are small and are known for breaking.

"Known" by whom? I've owned/wrenched on a-bodies for 30 years, and I've never heard of these bolts breaking. Ever. Nor have I ever had any of the hard parts fail on a KH setup.

Claiming they are "unsafe" is ridiculous.