Interesting info here. I have Camburg uniball UCA's and coilovers that use a 16" coil with stock lower arms. This large coil extends much further down than the stock shock, and because of this I smashed my brake hard line on the bottom of the coil.
I have been chatting with a guy that runs the exact same coilovers, with Total Chaos UCA's, and his brake hard line that comes out of the caliper is nowhere close to making contact. He informed me that his TC UCAs have 3 degrees of caster built in for a max of 5 degrees positive caster.
My caster is currently at 1.5 on the driver side and 2.1 on the passenger side. I asked for both side to be at 2.0 per DJ's specs, but was asked to come back next week per the alignment shops excuse.
Camburg claims to have built in caster as well. I'm going to call during business hours tomorrow, but am wondering if the 2.5 to 3.5 degrees posted directly above will be in addition to the 2 degrees max camber in Toyota's specs, making the acceptable range up 4.5-5.5 degrees.
This picture doesn't do a good job of showing the problem, but my replaced brake line with banjo bolt is directly below the coilover at full droop while at full steering lock shown here. With the right compression and steering lock, it will certainly smash again.
If I can push my lower ball joint another inch further forward, I'd be miles away from hitting the brake line on the coilover. I believe I need to increase my caster to the vicinity of 4.5 degrees positive.