Looking at your pictures/ the same offset F/R with a 2" stagger would apply with this kit also,,,0 through a +5,+6 would do it on both F/R wheels.
I know you will nail it,as we all don't like running spacers w/Custom wheels...Z1 does offer 2.5 & 5mm sets....you can always push them out a tad (if need be) but can't pull them back in.