This doesn't address your spacer ?, but as for the cable, over the years I have seen many cars/trucks with some sort of holder braket or tie back to position them out of the way of tires and suspension item. These were mostly OEM items some brackets some actually had springs to keep them some what flexible. If the present tires are working out other wise I think I would try repositioning the cable if possible as trying to space the wheel 2" seems problematic.

38 Chevy 1/2 ton being resto-moded
65 AC Cobra replica
USAF vet