Mate no mater what Mat from monster rides says you cant get extra droop from coil and shock ALONE as the UCA will contact the coil bucket, its that simple mate.
if the UCA falls x amount of mm before it contacts with the coil bucket with NO shock at all no matter what shock or coil you run it that measurement will remain the same.
also if you do go more then 40mm in our ST's you will be running a incorrect camber angle.
as i said earlier they way to fix it is with off set caster bushes or UCA's and with the price of caster bushes and install is around $400 you would be made not to spend the extra $100 on the arms and have them install for free.
there is a thread on here at the moment with linkjs to p[laces in the states that will send the UCA's to your door for less then $550 aussie.
the other thing about Ultimate is that you can rebuild the shocks for $65 and the coils and leafs have a LIFETIME warranty, so for you carrying heaps of tools and stuff that is great peace of mind.